“List of state highways in Iowa”的意思、由来-开放百科全书

词条

List of state highways in Iowa

释义

References

{{infobox state highway system
|shields=
|caption=Highway markers from different years
|interstate=Interstate nn (I-nn)
|us=U.S. Highway nn (US nn)
|state=Iowa nn
|links=IA
}}

State highways in the U.S. state of Iowa are owned and maintained by the Iowa Department of Transportation.{{Clear}}

{{expand list|date=July 2014}}{{routelist top|length_ref=^[1]}}{{routelist row
|state=IA
|type=Primary
|route=1
|length_mi=236
|length_ref=^[2]
|terminus_a=Missouri state line near Lamoni
|terminus_b=Minnesota state line near Northwood
|established=1920
|decommissioned=1926
|notes=Jefferson Highway through Iowa; became US 65
}}{{routelist row
|state=IA
|type=IA
|route=1
|length_mi=119.268
|terminus_a=Iowa 2 south of Keosauqua
|terminus_b=US 151 south of Anamosa
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=IA 1926
|route=2
|dab=1920–1939
|length_mi=232
|terminus_a=US 6 near Lewis
|terminus_b=IL 2 at Muscatine
|established=1920
|decommissioned=1939
|notes=Renumbered Iowa 92
}}{{routelist row
|state=IA
|type=IA
|route=2
|length_mi=251.376
|terminus_a=N-2 at Nebraska City, Neb.
|terminus_b=US 61 at Fort Madison
|established=1941
|notes=none
}}{{routelist row
|state=IA
|type=IA 1926
|route=3
|dab=1920–1941
|length_mi=264
|terminus_a=N-2 at Nebraska City, Neb.
|terminus_b=IL 9 at Fort Madison
|established=1920
|decommissioned=1941
|notes=Renumbered Iowa 2
}}{{routelist row
|state=IA
|type=IA
|route=3
|length_mi=326.163
|terminus_a=SD 50 near Westfield
|terminus_b=US 52 / US 61 / US 151 in Dubuque
|established=1945
|notes=none
}}{{routelist row
|state=IA
|type=IA 1961
|route=4
|dab=1920–1968
|length_mi=24.3
|terminus_a=US 59 / Iowa 141 at Denison
|terminus_b=Iowa 175 at Odebolt
|established=1920
|decommissioned=1968-12-31
|notes=Renumbered Iowa 39
}}{{routelist row
|state=IA
|type=IA
|route=4
|length_mi=146.343
|terminus_a=Iowa 44 in Panora
|terminus_b=MN 4 near Estherville
|established=1969-01-01
|notes=Former Iowa 17
}}{{routelist row
|state=IA
|type=IA 1961
|route=5
|dab=1920–1968
|length_mi=76.4
|terminus_a=Iowa 3 near Aurelia
|terminus_b=US 169 at Fort Dodge
|established=1920
|decommissioned=1968-12-31
|notes=Renumbered Iowa 7
}}{{routelist row
|state=IA
|type=IA
|route=5
|length_mi=103.540
|terminus_a=Route 5 south of Cincinnati
|terminus_b=I-35 near West Des Moines
|established=1969-01-01
|notes=Former portion of Iowa 60
}}{{routelist row
|state=IA
|type=Primary
|route=6
|length_mi=369
|length_ref=^[2]
|terminus_a=Nebraska state line at Council Bluffs
|terminus_b=Illinois state line at Clinton
|established=1920
|decommissioned=1926
|notes=Lincoln Highway through Iowa; became US 30
}}{{routelist row
|state=IA
|type=IA 1926
|route=6
|dab=1926–1931
|length_mi=104
|terminus_a=Route 5 near Cincinnati
|terminus_b=US 32 in Des Moines
|established=1926
|decommissioned=1931
|notes=Formerly No. 17 and No. 59
}}{{routelist row
|state=IA
|type=IA 1926
|route=7
|dab=1920–1939
|length_mi=140
|terminus_a=US 6 at Council Bluffs
|terminus_b=City US 6 in Des Moines
|established=1920
|decommissioned=1939
|notes=Replaced by Iowa 64
}}{{routelist row
|state=IA
|type=IA 1926
|route=7
|dab=1955–1957
|length_mi=0.5
|terminus_a=Iowa 99 in Oakville
|terminus_b=Oakville
|established=1955
|decommissioned=1957
|notes=Renumbered Iowa 407; spur route
}}{{routelist row
|state=IA
|type=IA 1961
|route=7
|dab=1957–1968
|length_mi=22
|terminus_a=I-29 / US 77 in Sioux City
|terminus_b=Iowa 3 near Brunsville
|established=1957
|decommissioned=1968-12-31
|notes=Former Iowa 29; portions given to Woodbury county and the rest was renumbered as unsigned Iowa 985
}}{{routelist row
|state=IA
|type=IA
|route=7
|length_mi=73.661
|terminus_a=Iowa 3 near Aurelia
|terminus_b=US 169 at Fort Dodge
|established=1969-01-01
|notes=Former Iowa 5
}}{{routelist row
|state=IA
|type=Primary
|route=8
|length_mi=283
|length_ref=^[2]
|terminus_a=No. 6 in Council Bluffs
|terminus_b=Illinois state line at Burlington
|established=1920
|decommissioned=1926
|notes=Became US 34
}}{{routelist row
|state=IA
|type=IA
|route=8
|length_mi=13.961
|terminus_a=US 63 in Traer
|terminus_b=US 218 near Garrison
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=9
|length_mi=295.088
|terminus_a=SD 42 near Larchwood
|terminus_b=WIS 82 at Lansing
|established=1920
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=10
|length_mi=104.512
|terminus_a=SD 46 near Hawarden
|terminus_b=Iowa 4 at Havelock
|established=1920
|notes=none
}}{{routelist row
|state=IA
|type=IA 1926
|route=11
|length_mi=98
|terminus_a=US 151 / Iowa 64 in Cedar Rapids
|terminus_b=US 52 / Iowa 24 in Calmar
|established=1920
|decommissioned=1941
|notes=Renumbered as part of Iowa 150
}}{{routelist row
|state=IA
|type=IA
|route=12
|length_mi=46.274
|terminus_a=US 20 / US 75 at Sioux City
|terminus_b=Iowa 10 in Hawarden
|established=1920
|notes=Signed as US 20 Bus through Sioux City
}}{{routelist row
|state=IA
|type=IA
|route=13
|length_mi=85.235
|terminus_a=US 30 / US 151 near Bertram
|terminus_b=US 52 near Froelich
|established=1920
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=14
|length_mi=187.838
|terminus_a=Iowa 2 at Corydon
|terminus_b=US 18 / US 218 Bus in Charles City
|established=1920
|notes=none
}}{{routelist row
|state=IA
|type=IA 1926
|route=15
|dab=1920–1935
|length_mi=111
|terminus_a=US 30 in Ames
|terminus_b=Minnesota state line near Lake Mills
|established=1920
|decommissioned=1935
|notes=Replaced by US 69
}}{{routelist row
|state=IA
|type=IA 1961
|route=15
|dab=1937–1968
|length_mi=14.3
|terminus_a=Iowa 137 at Eddyville
|terminus_b=US 63 in Ottumwa
|established=1937
|decommissioned=1968-12-31
|notes=Renumbered Iowa 23
}}{{routelist row
|state=IA
|type=IA 1961
|route=15
|dab=Van Buren County
|length_mi=4.655
|terminus_a=Route 15 south of Milton
|terminus_b=Iowa 2 at Milton
|established=1969-01-01
|decommissioned=2003
|notes=Former Iowa 23
}}{{routelist row
|state=IA
|type=IA
|route=15
|length_mi=63.578
|terminus_a=Iowa 3 near Pocahontas
|terminus_b=MN 15 near Armstrong
|established=1969-01-01
|notes=Former Iowa 44
}}{{routelist row
|state=IA
|type=IA 1926
|route=16
|dab=1920–1930
|length_mi=
|terminus_a=Missouri state line near Redding
|terminus_b=Minnesota state line near Ledyard
|established=1920
|decommissioned=1930
|notes=Became US 169
}}{{routelist row
|state=IA
|type=IA
|route=16
|length_mi=65.488
|terminus_a=US 34 near Agency
|terminus_b=US 61 at Wever
|established=1930
|notes=none
}}{{routelist row
|state=IA
|type=IA 1961
|route=17
|dab=1920–1968
|length_mi=146.3
|terminus_a=Iowa 64 in Panora
|terminus_b=MN 4 near Estherville
|established=1920
|decommissioned=1968-12-31
|notes=Renumbered Iowa 4
}}{{routelist row
|state=IA
|type=IA
|route=17
|length_mi=102.789
|terminus_a=Iowa 141 at Granger
|terminus_b=US 18 near Wesley
|established=1969-01-01
|notes=Former portion of Iowa 60
}}{{routelist row
|state=IA
|type=Primary
|route=18
|length_mi=148
|terminus_a=Missouri state line at Braddyville
|terminus_b=No. 23 at Sac City
|established=1920
|decommissioned=1926
|notes=Became US 71
}}{{routelist row
|state=IA
|type=Primary
|route=19
|length_mi=
|terminus_a=South Dakota state line near Inwood
|terminus_b=Wisconsin state line at Lansing
|established=1920
|decommissioned=1926
|notes=Replaced by US 18
}}{{routelist row
|state=IA
|type=IA 1926
|route=19
|dab=1927–1957
|length_mi=
|terminus_a=Backbone State Park
|terminus_b=Iowa 3 / Iowa 13 near Strawberry Point
|established=1927
|decommissioned=1957
|notes=Renumbered Iowa 410
}}{{routelist row
|state=IA
|type=Primary
|route=20
|length_mi=324
|length_ref=^[2]
|terminus_a=Illinois state line at Keokuk
|terminus_b=Minnesota state line near Burr Oak
|established=1920
|decommissioned=1926
|notes=Became US 61 and US 55
}}{{routelist row
|state=IA
|type=IA 1926
|route=21
|dab=1920–1934
|length_mi=
|terminus_a=Iowa 141 near Denison
|terminus_b=Minnesota state line near Allendorf
|established=1920
|decommissioned=1934
|notes=Replaced by Iowa 73
}}{{routelist row
|state=IA
|type=IA
|route=21
|length_mi=97.152
|terminus_a=Iowa 149 near Hedrick
|terminus_b=US 20 / Iowa 27 at Waterloo
|established=1934
|notes=none
}}{{routelist row
|state=IA
|type=Primary
|route=22
|length_mi=34
|length_ref=^[2]
|terminus_a=No. 5 at Le Mars
|terminus_b=Minnesota state line north of Rock Rapids
|established=1920
|decommissioned=1926
|notes=Became US 75
}}{{routelist row
|state=IA
|type=IA
|route=22
|length_mi=97.905
|terminus_a=Iowa 21 near Thornburg
|terminus_b=US 61 at Davenport
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=Primary
|route=23
|length_mi=130
|length_ref=^[2]
|terminus_a=South Dakota state line at Sioux City
|terminus_b=No. 16 at Fort Dodge
|established=1920
|decommissioned=1926
|notes=Became US 20
}}{{routelist row
|state=IA
|type=IA 1926
|route=23
|dab=1926–1968
|length_mi=4.7
|terminus_a=Route 15 south of Milton
|terminus_b=Iowa 2 at Milton
|established=1926
|decommissioned=1968
|notes=Renumbered Iowa 15
}}{{routelist row
|state=IA
|type=IA 1961
|route=23
|dab=1969–1997
|length_mi=14.316
|terminus_a=US 63 in Ottumwa
|terminus_b=Iowa 137 at Eddyville
|established=1969
|decommissioned=1997
|notes=Former Iowa 15; replaced by US 63 and county roads
}}{{routelist row
|state=IA
|type=IA
|route=23
|length_mi=16.022
|terminus_a=Iowa 92 at Oskaloosa
|terminus_b=Iowa 149 near Fremont
|established=1997
|notes=Former US 63
}}{{routelist row
|state=IA
|type=IA
|route=24
|length_mi=27.546
|terminus_a=US 18 / US 63 in New Hampton
|terminus_b=US 52 / Iowa 150 in Calmar
|established=1928
|notes=none
}}{{routelist row
|state=IA
|type=Primary
|route=25
|length_mi=20
|terminus_a=No. 15 / No. 24 at Winterset
|terminus_b=No. 2 / No. 17 at Adel
|established=1920
|decommissioned=1926
|notes=Renumbered Iowa 16
}}{{routelist row
|state=IA
|type=IA
|route=25
|length_mi=103.419
|terminus_a=Iowa 2 near Benton
|terminus_b=US 30 near Scranton
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=IA 1961
|route=26
|length_mi=9.1
|terminus_a=US 18 in Inwood
|terminus_b=Iowa 9 near Larchwood
|established=1930
|decommissioned=1968-12-31
|notes=Renumbered Iowa 182
}}{{routelist row
|state=IA
|type=IA
|route=26
|length_mi=11.370
|terminus_a=Iowa 9 in Lansing
|terminus_b=MN 26 at New Albin
|established=1969-01-01
|notes=Former Iowa 182
}}{{Routelist row
|state=IA
|type=IA 1961
|route=27
|dab=1930–1980
|length_mi=6.8
|terminus_a=Alvord
|terminus_b=US 75 near Rock Rapids
|established=1930
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=AOTS
|route=27
|sortkey=IA0027
|length_mi=281.689
|terminus_a=Route 27 near Wayland, Mo.
|terminus_b=I-35 at the Minnesota state line
|established=2001
|notes=Avenue of the Saints
}}{{routelist row
|state=IA
|type=Primary
|route=28
|length_mi=72
|length_ref=^[2]
|terminus_a=No. 6 / No. 11 in Cedar Rapids
|terminus_b=No. 5 / No. 20 in Dubuque
|established=1920
|decommissioned=1926
|notes=Became US 161
}}{{routelist row
|state=IA
|type=IA
|route=28
|length_mi=21.613
|terminus_a=Iowa 92 at Martensdale
|terminus_b=I-35 / I-80 at Johnston
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=IA 1926
|route=29
|length_mi=22
|terminus_a=I-29 / US 77 in Sioux City
|terminus_b=Iowa 3 near Brunsville
|established=1920
|decommissioned=1957
|notes=Renumbered Iowa 7
}}{{routelist row
|state=IA
|type=Primary
|route=30
|length_mi=25
|terminus_a=No. 23 at Moville
|terminus_b=No. 5 at Remsen
|established=1920
|decommissioned=1926
|notes=Renumbered Iowa 140
}}{{routelist row
|state=IA
|type=IA
|route=31
|length_mi=38.504
|terminus_a=US 59 near Quimby
|terminus_b=Iowa 141 near Smithland
|established=1920
|notes=none
}}{{routelist row
|state=IA
|type=Primary
|route=32
|length_mi=5
|terminus_a=No. 5 near Cleghorn
|terminus_b=Cleghorn
|established=1920
|decommissioned=1926
|notes=Renumbered Iowa 145
}}{{routelist row
|state=IA
|type=IA
|route=32
|length_mi=5.101
|terminus_a=US 20 at Dubuque
|terminus_b=US 52 / Iowa 3 at Sageville
|established=1995
|decommissioned=2017
|notes=none
}}{{routelist row
|state=IA
|type=IA 1961
|route=33
|length_mi=55.8
|terminus_a=US 75 at Le Mars
|terminus_b=MN 60 at Bigelow, Minn.
|established=1930
|decommissioned=1968-12-31
|notes=Renumbered Iowa 60
}}{{routelist row
|state=IA
|type=Primary
|route=34
|length_mi=68
|terminus_a=No. 4 at Denison
|terminus_b=No. 12 at Sioux City
|established=1920
|decommissioned=1926
|notes=Renumbered Iowa 141
}}{{Routelist row
|state=IA
|type=IA 1961
|route=36
|length_mi=2.983
|terminus_a=Wall Lake
|terminus_b=US 71 near Wall Lake
|established=1920
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=37
|length_mi=40.321
|terminus_a=Iowa 175 near Turin
|terminus_b=US 59 near Earling
|established=1920
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=38
|length_mi=98.941
|terminus_a=US 61 Bus / Iowa 92 in Muscatine
|terminus_b=Iowa 3 near Edgewood
|established=1920
|notes=none
}}{{routelist row
|state=IA
|type=IA 1961
|route=39
|length_mi=11.5
|terminus_a=US 30 near Logan
|terminus_b=Iowa 64/Iowa 191 at Portsmouth
|established=1920
|decommissioned=1968-12-31
|notes=Renumbered Iowa 44
}}{{routelist row
|state=IA
|type=IA
|route=39
|length_mi=24.321
|terminus_a=US 59 at Denison
|terminus_b=Iowa 175 at Odebolt
|established=1969-01-01
|notes=Former Iowa 4
}}{{routelist row
|state=IA
|type=Primary
|route=40
|length_mi=262
|length_ref=^[2]
|terminus_a=No. 20 in Keokuk
|terminus_b=Minnesota state line near Mona
|established=1920
|decommissioned=1926
|notes=Renumbered US 161, US 30, and US 218
}}{{Routelist row
|state=IA
|type=IA 1961
|route=40
|length_mi=3.524
|terminus_a=Allerton
|terminus_b=Iowa 2 near Corydon
|established=1926
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=41
|length_mi=1.827
|terminus_a=Malvern
|terminus_b=US 34 near Malvern
|established=1920
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=42
|length_mi=4.2
|terminus_a=US 275 / Iowa 2 near Riverton
|terminus_b=Riverton
|established=1920
|decommissioned=1981
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=43
|length_mi=1.5
|terminus_a=Ringsted
|terminus_b=Iowa 15 near Ringsted
|established=1920
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA 1961
|route=44
|length_mi=63.6
|terminus_a=Iowa 3 near Pocahontas
|terminus_b=MN 15 near Armstrong
|established=1920
|decommissioned=1968-12-31
|notes=Renumbered Iowa 15
}}{{routelist row
|state=IA
|type=IA
|route=44
|length_mi=104.524
|terminus_a=US 30 near Logan
|terminus_b=Iowa 141 at Grimes
|established=1969-01-01
|notes=Former Iowa 39 and Iowa 64
}}{{Routelist row
|state=IA
|type=IA 1961
|route=45
|length_mi=1.324
|terminus_a=Manilla
|terminus_b=Iowa 141 near Manilla
|established=1920
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=46
|length_mi=6.568
|terminus_a=Iowa 5 near Avon
|terminus_b=Iowa 163 in Des Moines
|established=1953
|decommissioned=1998
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=47
|length_mi=0.8
|terminus_a=Iowa 14 near Allison
|terminus_b=Allison
|established=1941
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=48
|length_mi=47.919
|terminus_a=US 59 at Shenandoah
|terminus_b=US 6 near Lewis
|established=1920
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=49
|length_mi=27.228
|terminus_a=Iowa 2 in Bedford
|terminus_b=US 34 in Adams County
|established=1920
|decommissioned=2003
|notes=Was originally a spur route from US 34 to Lenox
}}{{Routelist row
|state=IA
|type=IA 1961
|route=50
|length_mi=7.135
|terminus_a=US 169 near Lehigh
|terminus_b=Lehigh
|established=1920
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=51
|length_mi=11.007
|terminus_a=US 18 / US 52 at Postville
|terminus_b=Iowa 9 near Waukon
|established=1920
|notes=none
}}{{routelist row
|state=IA
|type=Primary
|route=53
|length_mi=13
|terminus_a=No. 14 near Rockford
|terminus_b=No. 19 near Nora Springs
|established=1920
|decommissioned=1926
|notes=Renumbered Iowa 147
}}{{routelist row
|state=IA
|type=IA 1926
|route=53
|length_mi=3
|terminus_a=Iowa 10 near Clarksville
|terminus_b=Clarksville
|established=1926
|decommissioned=1949
|notes=Formerly No. 55
}}{{Routelist row
|state=IA
|type=IA 1961
|route=54
|length_mi=2.9
|terminus_a=Marble Rock
|terminus_b=Iowa 14 in Floyd County
|established=1920
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=Primary
|route=55
|length_mi=3
|terminus_a=No. 10 near Clarksville
|terminus_b=Clarksville
|established=1920
|decommissioned=1926
|notes=Became Iowa 53
}}{{Routelist row
|state=IA
|type=IA 1961
|route=55
|length_mi=4.506
|terminus_a=Seymour
|terminus_b=Iowa 2 near Promise City
|established=1934
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=56
|length_mi=24.432
|terminus_a=Iowa 150 at West Union
|terminus_b=Iowa 13 at Elkader
|established=1920
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=57
|length_mi=43.765
|terminus_a=US 65 near Iowa Falls
|terminus_b=US 218 / Iowa 27 / Iowa 58 at Cedar Falls
|established=1986
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=58
|length_mi=12.030
|terminus_a=US 63 at Hudson
|terminus_b=US 218 / Iowa 27 / Iowa 57 at Cedar Falls
|established=1920
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=60
|dab=1920–1968
|length_mi=223.8
|terminus_a=Route 5 south of Cincinnati
|terminus_b=US 18 near Wesley
|established=1920
|decommissioned=1968
|notes=Renumbered Iowa 5 and Iowa 17
}}{{routelist row
|state=IA
|type=IA
|route=60
|length_mi=58.771
|terminus_a=US 75 at Le Mars
|terminus_b=MN 60 at Bigelow, Minn.
|established=1969
|notes=Former Iowa 33
}}{{routelist row
|state=IA
|type=Primary
|route=61
|length_mi=73
|terminus_a=No. 28 at Anamosa
|terminus_b=No. 6 in Lyons
|established=1920
|decommissioned=1926
|notes=Renumbered Iowa 117 and Iowa 136
}}{{routelist row
|state=IA
|type=IA
|route=62
|length_mi=19.633
|terminus_a=Iowa 64 at Maquoketa
|terminus_b=US 52 in Bellevue
|established=1920
|notes=none
}}{{routelist row
|state=IA
|type=Primary
|route=63
|length_mi=24
|terminus_a=No. 59 in New Sharon
|terminus_b=No. 7 in Grinnell
|established=1920
|decommissioned=1926
|notes=Renumbered Iowa 146
}}{{routelist row
|state=IA
|type=IA
|route=64
|length_mi=64.355
|terminus_a=US 151 at Anamosa
|terminus_b=US 52 / IL 64 at Savanna, Ill.
|established=1936
|notes=none
}}{{routelist row
|state=IA
|type=Primary
|route=65
|length_mi=21
|terminus_a=No. 8 at Lucas
|terminus_b=No. 1 south of Indianola
|established=1920
|decommissioned=1926
|notes=Renumbered Iowa 137
}}{{Routelist row
|state=IA
|type=IA 1961
|route=66
|length_mi=7.011
|terminus_a=Iowa 2 near Diagonal
|terminus_b=Diagonal
|established=1930
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=68
|length_mi=1.933
|terminus_a=Melrose
|terminus_b=US 34 near Melrose
|established=1920
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=Primary
|route=69
|length_mi=3
|terminus_a=No. 3 near Mystic
|terminus_b=Mystic
|established=1920
|decommissioned=1926
|notes=Renumbered Iowa 138
}}{{routelist row
|state=IA
|type=IA
|route=70
|length_mi=23.954
|terminus_a=Iowa 92 at Columbus Junction
|terminus_b=US 6 in West Liberty
|established=1969-01-01
|notes=Former Iowa 76
}}{{routelist row
|state=IA
|type=Primary
|route=71
|length_mi=3
|terminus_a=Moulton
|terminus_b=No. 3 near Moulton
|established=1920
|decommissioned=1926
|notes=Renumbered Iowa 142
}}{{routelist row
|state=IA
|type=IA 1926
|route=73
|length_mi=225
|terminus_a=Missouri state line south of Shenandoah
|terminus_b=Minnesota state line near Allendorf
|established=1934
|decommissioned=1935
|notes=Replaced by US 59
}}{{routelist row
|state=IA
|type=Primary
|route=75
|length_mi=2
|terminus_a=No. 5 near Marcus
|terminus_b=Marcus
|established=1920
|decommissioned=1926
|notes=Renumbered Iowa 143
}}{{routelist row
|state=IA
|type=IA
|route=76
|length_mi=22.9
|terminus_a=Columbus City
|terminus_b=US 6 in West Liberty
|established=1920
|decommissioned=1968-12-31
|notes=Renumbered Iowa 70
}}{{routelist row
|state=IA
|type=IA
|route=76
|length_mi=48.911
|terminus_a=US 18 near McGregor
|terminus_b=MN 76 near Eitzen, Minn.
|established=1969-01-01
|notes=Former portion of Iowa 13
}}{{Routelist row
|state=IA
|type=IA 1961
|route=77
|length_mi=2.685
|terminus_a=Iowa 92 near Keota
|terminus_b=Keota
|established=1920
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=78
|length_mi=58.429
|terminus_a=Iowa 149 near Martinsburg
|terminus_b=US 61 near Morning Sun
|established=1920
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=79
|dab=1920–1980
|length_mi=1.7
|terminus_a=Iowa 2 near Bonaparte
|terminus_b=Bonaparte
|established=1920
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=79
|length_mi=5.637
|terminus_a=Geode State Park
|terminus_b=US 34 in Middletown
|established=1980
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=81
|length_mi=9.2
|terminus_a=Iowa 92 near West Chester
|terminus_b=Iowa 22 at Wellman
|established=1920
|decommissioned=1968-12-31
|notes=Renumbered Iowa 114
}}{{routelist row
|state=IA
|type=IA
|route=81
|length_mi=2.215
|terminus_a=Route 81 near Farmington
|terminus_b=Iowa 2 near Farmington
|established=1969-01-01
|notes=Former Iowa 114
}}{{Routelist row
|state=IA
|type=IA 1961
|route=82
|length_mi=3.773
|terminus_a=Blairstown
|terminus_b=US 30 near Blairstown
|established=1920
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=83
|length_mi=34.191
|terminus_a=US 59 in Avoca
|terminus_b=Iowa 148 in Anita
|established=1920
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=84
|length_mi=2.0
|terminus_a=The Eastern Iowa Airport
|terminus_b=I-380 near Cedar Rapids
|established=1943
|decommissioned=1980
|notes=Airport access road
}}{{routelist row
|state=IA
|type=IA
|route=85
|length_mi=8.408
|terminus_a=Montezuma city limits
|terminus_b=Iowa 21 near Deep River
|established=1920
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=86
|dab=1945–1980
|length_mi=0.4
|terminus_a=Fertile
|terminus_b=Iowa 9 at Fertile
|established=1945
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=86
|length_mi=12.519
|terminus_a=US 71 near Milford
|terminus_b=MN 86 near Spirit Lake
|established=1981
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=88
|length_mi=8.0
|terminus_a=US 61 / Iowa 2 in Fort Madison
|terminus_b=Iowa 16 in Denmark
|established=1940
|decommissioned=1980
|notes=Originally a spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=89
|length_mi=7.7
|terminus_a=Iowa 141 near Woodward
|terminus_b=Iowa 17 in Madrid
|established=1946
|decommissioned=1980-11
|notes=Replaced by Iowa 210
}}{{routelist row
|state=IA
|type=Primary
|route=90
|length_mi=40
|terminus_a=No. 17 near Bouton
|terminus_b=No. 16 at Harcourt
|established=1920
|decommissioned=1926
|notes=Became Iowa 16
}}{{routelist row
|state=IA
|type=IA 1926
|route=90
|dab=1926–1932
|length_mi=16
|terminus_a=Iowa 14 at Grundy Center
|terminus_b=Iowa 59 near Voorhies
|established=1926
|decommissioned=1932
|notes=Formerly No. 58
}}{{routelist row
|state=IA
|type=IA 1961
|route=90
|length_mi=16.2
|terminus_a=I-80 in Dallas County
|terminus_b=I-35 in Des Moines
|established=1932
|decommissioned=1981
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=91
|dab=1940–1980
|length_mi=4.1
|terminus_a=Ledyard
|terminus_b=US 169 near Ledyard
|established=1940
|decommissioned=1980-05
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=91
|length_mi=4.643
|terminus_a=Iowa 9 in Lyon County
|terminus_b=MN 91 at the Minnesota state line
|established=1980
|decommissioned=2003
|notes=
}}{{routelist row
|state=IA
|type=IA
|route=92
|length_mi=274.231
|terminus_a=US 275 / N-92 in Council Bluffs
|terminus_b=IL 92 at Muscatine
|established=1939
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=93
|length_mi=29.534
|terminus_a=US 63 near Tripoli
|terminus_b=Iowa 150 in Fayette
|established=1920
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=94
|length_mi=11.168
|terminus_a=US 151 Business in Cedar Rapids
|terminus_b=Palo
|established=1966
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA 1961
|route=95
|length_mi=3.6
|terminus_a=Carbon
|terminus_b=Iowa 148 north of Corning
|established=1932
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=96
|length_mi=16.635
|terminus_a=Iowa 14 near Gladbrook
|terminus_b=US 63 near Gladbrook
|established=1920
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=97
|length_mi=1.532
|terminus_a=Russell
|terminus_b=US 34 near Russell
|established=1920
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=98
|length_mi=1.814
|terminus_a=Leando
|terminus_b=Iowa 16 near Douds
|established=1944
|decommissioned=2017
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=99
|length_mi=33.232
|terminus_a=US 34 in Burlington
|terminus_b=US 61 in Wapello
|established=1931
|decommissioned=2003
|notes=
}}{{routelist row
|state=IA
|type=IA
|route=100
|length_mi=11.628
|terminus_a=Covington Road in Cedar Rapids
|terminus_b=US 151 / Iowa 13 near Marion
|established=1984
|notes=none
}}{{routelist row
|state=IA
|type=IA 1961
|route=101
|length_mi=15.56
|terminus_a=US 218 in Vinton
|terminus_b=Iowa 150 north of Urbana
|established=1920
|decommissioned=1984
|notes=Replaced by a relocated Iowa 150
}}{{Routelist row
|state=IA
|type=IA 1961
|route=102
|dab=1920–1980
|length_mi=1.9
|terminus_a=Hawkeye
|terminus_b=US 18 near Hawkeye
|established=1920
|decommissioned=1980
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=102
|noshield=yes
|length_mi=0.501
|terminus_a=New Sharon city limits
|terminus_b=US 63 / Iowa 146 in New Sharon
|established=1980
|notes=Unsigned highway
}}{{Routelist row
|state=IA
|type=IA 1961
|route=103
|length_mi=15.649
|terminus_a=US 218 near Donnellson
|terminus_b=US 61 / Iowa 2 in Fort Madison
|established=1920
|decommissioned=2003
|notes=
}}{{Routelist row
|state=IA
|type=IA 1961
|route=104
|length_mi=1.5
|terminus_a=Woodburn
|terminus_b=US 34 near Woodburn
|established=1927
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=106
|length_mi=9.0
|terminus_a=Iowa 107 in Clear Lake
|terminus_b=US 65 in Mason City
|established=1920
|decommissioned=1980
|notes=
}}{{Routelist row
|state=IA
|type=IA 1961
|route=107
|length_mi=27.579
|established=1920
|decommissioned=2011
|terminus_a=Iowa 3 near Alexander
|terminus_b=CR B35 near Clear Lake
|notes=All but parts in Meservey and Thornton removed in 2003
}}{{Routelist row
|state=IA
|type=IA 1961
|route=108
|length_mi=1.2
|terminus_a=Delta
|terminus_b=Iowa 92 near Delta
|established=1923
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=109
|length_mi=1.268
|terminus_a=Oxford
|terminus_b=US 6 near Oxford
|established=1923
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=110
|length_mi=14.789
|terminus_a=US 20 at Schaller
|terminus_b=Iowa 7 at Storm Lake
|established=1934
|notes=none
}}{{routelist row
|state=IA
|type=IA 1961
|route=111
|length_mi=26.5
|terminus_a=Woden
|terminus_b=Kanawha
|established=1923
|decommissioned=1990
|notes=Double spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=112
|length_mi=5.2
|terminus_a=Volga
|terminus_b=Iowa 13 near Osborne
|established=1931
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=113
|length_mi=1.187
|terminus_a=Iowa 64 near Spragueville
|terminus_b=Spragueville
|established=1938
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA 1961
|route=114
|length_mi=2.2
|terminus_a=Route 81 near Farmington
|terminus_b=Iowa 2 near Farmington
|established=1923
|decommissioned=1968-12-31
|notes=Renumbered Iowa 81
}}{{Routelist row
|state=IA
|type=IA 1961
|route=114
|length_mi=9.2
|established=1969-01-01
|decommissioned=1980
|terminus_a=Iowa 92 near West Chester
|terminus_b=Iowa 22 at Wellman
|notes=Former Iowa 81
}}{{Routelist row
|state=IA
|type=IA 1961
|route=115
|length_mi=1.237
|terminus_a=US 34 near Stanton
|terminus_b=Viking Lake State Park
|established=1980
|decommissioned=2003
|notes=Park access road
}}{{routelist row
|state=IA
|type=IA
|route=116
|noshield=yes
|length_mi=2.776
|terminus_a=US 218 near Waverly
|terminus_b=Iowa 3 in Waverly
|established=1998
|notes=Section of US 218 Business in Waverly
}}{{routelist row
|state=IA
|type=IA
|route=117
|length_mi=18.562
|terminus_a=Iowa 163 at Prairie City
|terminus_b=US 65 / Iowa 330 near Mingo
|established=1936
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=119
|length_mi=1.0
|terminus_a=Dorchester
|terminus_b=Iowa 76 near Dorchester
|established=1923
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=120
|length_mi=0.8
|terminus_a=Stanton
|terminus_b=US 34 near Stanton
|established=1924
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=122
|length_mi=12.264
|terminus_a=I-35 / US 18 at Clear Lake
|terminus_b=Mason City city limits
|established=1999
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=123
|length_mi=
|terminus_a=US 34 near Rome
|terminus_b=Rome
|established=1970
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=124
|length_mi=2.567
|terminus_a=Iowa 4 in Calhoun County
|terminus_b=Twin Lakes State Park
|established=1924
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=126
|length_mi=0.7
|terminus_a=US 6 near Mitchellville
|terminus_b=Mitchellville
|established=1924
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=127
|length_mi=15.985
|terminus_a=I-29 near Mondamin
|terminus_b=US 30 in Logan
|established=1924
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=128
|length_mi=6.982
|terminus_a=Iowa 13 near Elkader
|terminus_b=US 52 near Garnavillo
|established=1924
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=130
|length_mi=32.023
|terminus_a=Iowa 38 in Tipton
|terminus_b=I-80 / US 61 at Davenport
|established=1969
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=131
|length_mi=4.520
|terminus_a=Iowa 21 in Belle Plaine
|terminus_b=US 30 near Belle Plaine
|established=1937
|decommissioned=2003
|notes=Part of the Lincoln Highway
}}{{Routelist row
|state=IA
|type=IA 1961
|route=133
|length_mi=0.970
|terminus_a=US 30 in Nevada
|terminus_b=Nevada
|established=1963
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=134
|length_mi=4.0
|terminus_a=US 65 near Hampton
|terminus_b=Geneva
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=135
|length_mi=1.9
|terminus_a=Montour
|terminus_b=US 30 near Montour
|established=1954
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=136
|length_mi=97.733
|terminus_a=IL 136 at Clinton
|terminus_b=US 52 / Iowa 3 at Luxemburg
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=IA 1926
|route=137
|dab=1926–1934
|length_mi=21
|terminus_a=US 34 at Lucas
|terminus_b=US 65 near Indianola
|established=1926
|decommissioned=1934
|notes=Formerly No. 65
}}{{routelist row
|state=IA
|type=IA
|route=137
|length_mi=14.526
|terminus_a=Iowa 5 at Albia
|terminus_b=US 63 / Iowa 163 at Eddyville
|established=1934
|notes=none
}}{{routelist row
|state=IA
|type=IA 1961
|route=138
|length_mi=3
|terminus_a=Iowa 2 near Mystic
|terminus_b=Mystic
|established=1926
|decommissioned=1973
|notes=Formerly No. 69
}}{{routelist row
|state=IA
|type=IA 1926
|route=139
|dab=1926–1929
|length_mi=21
|terminus_a=US 161 in Iowa City
|terminus_b=Iowa 38 near Rochester
|established=1926
|decommissioned=1929
|notes=Formerly No. 74
}}{{routelist row
|state=IA
|type=IA
|route=139
|length_mi=11.431
|terminus_a=Iowa 9 near Cresco
|terminus_b=MN 139 near Harmony, Minn
|established=1930
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=140
|length_mi=25.309
|terminus_a=US 20 at Moville
|terminus_b=Iowa 3 at Remsen
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=141
|length_mi=155.362
|terminus_a=I-29 near Sloan
|terminus_b=I-35 / I-80 at Grimes
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=IA 1961
|route=142
|dab=1926–1968
|length_mi=10.5
|terminus_a=Route 202 at Coatsville, Mo
|terminus_b=Iowa 2 near Moulton
|established=1926
|decommissioned=1968-12-31
|notes=Renumbered Iowa 202
}}{{Routelist row
|state=IA
|type=IA 1961
|route=142
|length_mi=20.901
|terminus_a=Iowa 2 in Plano
|terminus_b=Iowa 5 near Moravia
|established=1980
|decommissioned=2003
|notes=
}}{{routelist row
|state=IA
|type=IA
|route=143
|length_mi=12.049
|terminus_a=Iowa 3 at Marcus
|terminus_b=Iowa 10 at Granville
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=144
|length_mi=34.039
|terminus_a=Iowa 141 at Perry
|terminus_b=Iowa 175 near Harcourt
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=IA 1926
|route=145
|dab=1926–1931
|length_mi=5
|terminus_a=Iowa 5 near Cleghorn
|terminus_b=Cleghorn
|established=1926
|decommissioned=1931
|notes=Formerly No. 32
}}{{Routelist row
|state=IA
|type=IA 1961
|route=145
|length_mi=7.408
|terminus_a=I-29 near Thurman
|terminus_b=US 275 near Sidney
|established=1931
|decommissioned=2003
|notes=
}}{{routelist row
|state=IA
|type=IA
|route=146
|length_mi=42.735
|terminus_a=US 63 / Iowa 102 in New Sharon
|terminus_b=US 30 in Le Grand
|established=1926
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=147
|length_mi=6.706
|terminus_a=Rockford
|terminus_b=Iowa 14 in Floyd County
|established=1926
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=148
|length_mi=66.828
|terminus_a=Route 148 near Bedford
|terminus_b=I-80 / US 6 near Anita
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=149
|length_mi=65.897
|terminus_a=US 34 in Ottumwa
|terminus_b=I-80 near Williamsburg
|established=1926
|notes=none
}}{{routelist row
|state=IA
|type=IA 1926
|route=150
|dab=1926–1930
|length_mi=19
|terminus_a=US 32 at Homestead
|terminus_b=US 30 near Cedar Rapids
|established=1926
|decommissioned=1930
|notes=Formerly No. 13
}}{{routelist row
|state=IA
|type=IA
|route=150
|length_mi=85.093
|terminus_a=US 218 at Vinton
|terminus_b=US 52 / Iowa 24 at Calmar
|established=1941
|notes=none
}}{{routelist row
|state=IA
|type=IA 1926
|route=151
|length_mi=13
|terminus_a=US 71 at Auburn
|terminus_b=Iowa 17 near Lake City
|established=1926
|decommissioned=1938
|notes=Formerly No. 35
}}{{routelist row
|state=IA
|type=IA 1961
|route=152
|dab=1926–1980
|length_mi=2
|terminus_a=US 34 near Murray
|terminus_b=Murray
|established=1926
|decommissioned=1980
|notes=Formerly No. 8
}}{{routelist row
|state=IA
|type=IA 1961
|route=152
|length_mi=1.402
|terminus_a=I-35 near Osceola
|terminus_b=US 69 at Osceola
|established=1980
|decommissioned=2014
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=155
|length_mi=3.0
|terminus_a=Nodaway
|terminus_b=US 34 near Nodaway
|established=1933
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=156
|length_mi=4.748
|terminus_a=Iowa 5 near Marysville
|terminus_b=Bussey
|established=1928
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=157
|length_mi=1.032
|terminus_a=US 63 near Lime Springs
|terminus_b=Lime Springs
|established=1931
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=159
|length_mi=1.8
|terminus_a=Iowa 92 near Harper
|terminus_b=Harper
|established=1929
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=160
|length_mi=2.446
|terminus_a=Iowa 415 at Ankeny
|terminus_b=I-35 at Ankeny
|established=1947
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=161
|length_mi=1.224
|terminus_a=Iowa 141 at Dedham
|terminus_b=Iowa 141 near Dedham
|established=1951
|decommissioned=2003
|notes=Former route of Iowa 141
}}{{Routelist row
|state=IA
|type=IA 1961
|route=162
|length_mi=2.660
|established=1930
|decommissioned=1982
|terminus_a=Pammel State Park
|terminus_b=Iowa 92 in Madison County
|notes=Park access road; renumbered Iowa 322 because it was too close to US 169
}}{{routelist row
|state=IA
|type=IA
|route=163
|length_mi=166.270
|terminus_a=US 69 in Des Moines
|terminus_b=US 34 at Burlington
|established=1937
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=165
|length_mi=0.410
|terminus_a=Abbott Drive at Omaha, Neb.
|terminus_b=Abbott Drive at Omaha, Neb.
|established=1957
|notes=Only state highway west of the Missouri River
}}{{Routelist row
|state=IA
|type=IA 1961
|route=166
|length_mi=0.6
|terminus_a=Hastings
|terminus_b=US 34 near Hastings
|established=1930
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=167
|length_mi=3.1
|terminus_a=Doon
|terminus_b=US 75 near Doon
|established=1930
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=168
|length_mi=2.8
|terminus_a=Iowa 83 near Minden
|terminus_b=Shelby
|established=1930
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=171
|length_mi=1.1
|terminus_a=Elberon
|terminus_b=Iowa 21 near Elberon
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=172
|length_mi=4.2
|terminus_a=Elgin
|terminus_b=US 18 in Clermont
|established=1930
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=173
|length_mi=14.680
|terminus_a=Iowa 83 near Atlantic
|terminus_b=Iowa 44 at Kimballton
|established=1930
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=175
|length_mi=221.367
|terminus_a=N-51 at Decatur, Neb
|terminus_b=US 63 near Hudson
|established=1930
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=177
|length_mi=3.2
|terminus_a=Iowa 9 near Osage
|terminus_b=Elgin
|established=1937
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=178
|length_mi=0.9
|terminus_a=Iowa 9 near Little Rock
|terminus_b=Little Rock
|established=1930
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA 1961
|route=179
|length_mi=0.7
|terminus_a=US 69 near Klemme
|terminus_b=Klemme
|established=1930
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=180
|length_mi=2.4
|terminus_a=Hayesville
|terminus_b=Iowa 149 near Hayesville
|established=1930
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=181
|length_mi=9.596
|terminus_a=Iowa 5 / Iowa 92 near Pleasantville
|terminus_b=Melcher-Dallas
|established=1931
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA 1961
|route=182
|dab=1930–1968
|length_mi=11.4
|terminus_a=Iowa 9 in Lansing
|terminus_b=MN 26 at New Albin
|established=1930
|decommissioned=1968-12-31
|notes=Renumbered Iowa 26
}}{{routelist row
|state=IA
|type=IA
|route=182
|length_mi=9.051
|terminus_a=US 18 in Inwood
|terminus_b=Iowa 9 near Larchwood
|established=1969-01-01
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=183
|length_mi=29.952
|terminus_a=Iowa 127 near Mondamin
|terminus_b=Iowa 141 in Ute
|established=1930
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=184
|length_mi=9.596
|terminus_a=US 275 near Randolph
|terminus_b=Randolph
|established=1934
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=186
|length_mi=3.3
|terminus_a=US 34 near Prescott
|terminus_b=Prescott
|established=1930
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=187
|length_mi=28.385
|terminus_a=US 20 near Masonville
|terminus_b=Iowa 150 near Fayette
|established=1931
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=188
|length_mi=24.231
|terminus_a=Iowa 3 near Clarksville
|terminus_b=US 63 near Tripoli
|established=1945
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=189
|length_mi=1.0
|terminus_a=Bridgewater
|terminus_b=Iowa 92 north or Bridgwater
|established=1930
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=190
|length_mi=7.1
|terminus_a=Fairbank
|terminus_b=Iowa 150 near Oelwein
|established=1931
|decommissioned=1980
|notes=Replaced by Iowa 281
}}{{routelist row
|state=IA
|type=IA
|route=191
|length_mi=22.790
|terminus_a=I-680 near Neola
|terminus_b=Iowa 37 at Earling
|established=1930
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=192
|length_mi=2.426
|terminus_a=I-29 / I-80 at Council Bluffs
|terminus_b=Kanesville Boulevard in Council Bluffs
|established=1931
|notes=Renumbered from Iowa 241; truncated in 2016
}}{{Routelist row
|state=IA
|type=IA 1961
|route=193
|length_mi=10.852
|terminus_a=US 18 in Fayette County
|terminus_b=Iowa 24 in Jackson Junction
|established=1930
|decommissioned=2003
|notes=
}}{{Routelist row
|state=IA
|type=IA 1961
|route=195
|length_mi=2.896
|terminus_a=Iowa 4 near Plover
|terminus_b=Plover
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=196
|length_mi=10.136
|terminus_a=US 71 / Iowa 175 near Lake View
|terminus_b=US 20 near Sac City
|established=1935
|decommissioned=2015
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=197
|length_mi=2.567
|terminus_a=Iowa 3 near Albert City
|terminus_b=Albert City
|established=1937
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=198
|length_mi=2.231
|terminus_a=Garrison
|terminus_b=US 218 near Garrison
|established=1930
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=199
|length_mi=2.666
|terminus_a=Van Horne
|terminus_b=US 218 near Van Horne
|established=1930
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=200
|length_mi=2.163
|terminus_a=US 30 near Keystone
|terminus_b=Keystone
|established=1930
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=201
|length_mi=4.755
|terminus_a=Norway
|terminus_b=US 30 / US 218 near Atkins
|established=1930
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=202
|length_mi=10.461
|terminus_a=Route 202 at Coatsville, Mo
|terminus_b=Iowa 2 near Moulton
|established=1969-01-01
|notes=Former Iowa 142
}}{{Routelist row
|state=IA
|type=IA 1961
|route=203
|length_mi=8.8
|established=1930
|decommissioned=1981
|terminus_a=Iowa 9
|terminus_b=Terril
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=204
|length_mi=5.407
|terminus_a=Iowa 2 near Garden Grove
|terminus_b=Garden Grove
|established=1930
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=205
|length_mi=2.927
|terminus_a=US 65 near Milo
|terminus_b=Milo
|established=1930
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=206
|length_mi=6.221
|terminus_a=US 65 near Liberty Center
|terminus_b=Liberty Center
|established=1930
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=207
|length_mi=3.058
|terminus_a=I-35 near New Virginia
|terminus_b=New Virginia
|established=1930
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=209
|length_mi=0.5
|established=1931
|decommissioned=1975
|terminus_a=Iowa 149 near Conroy
|terminus_b=Conroy
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=210
|length_mi=34.781
|terminus_a=Iowa 141 near Woodward
|terminus_b=US 65 near Collins
|established=1938
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=212
|length_mi=12.157
|terminus_a=Iowa 21 near Belle Plaine
|terminus_b=US 6 at Marengo
|established=1934
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=213
|length_mi=3.9
|terminus_a=Blakesburg
|terminus_b=US 34 north of Blakesburg
|established=1931
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=214
|length_mi=5.736
|terminus_a=Iowa 175 near Ivester
|terminus_b=Wellsburg
|established=1931
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=215
|length_mi=8.738
|terminus_a=Union
|terminus_b=Iowa 175 in Eldora
|established=1931
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=219
|length_mi=1.8
|terminus_a=Iowa 9 near Lake Park
|terminus_b=Lake Park
|established=1931
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=220
|length_mi=7.233
|terminus_a=US 6 at South Amana
|terminus_b=US 151 at Amana
|established=1930
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=221
|length_mi=3.909
|terminus_a=I-35 near Story City
|terminus_b=Roland
|established=1947
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=222
|length_mi=14.8
|terminus_a=Iowa 15 near Ottosen
|terminus_b=Livermore
|established=1931
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=224
|length_mi=10.587
|terminus_a=US 6 near Kellogg
|terminus_b=Iowa 14 near Laurel
|established=1930
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=225
|length_mi=7.688
|terminus_a=Sully
|terminus_b=Iowa 146 in Searsboro
|established=1931
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=226
|length_mi=10.8
|terminus_a=US 18
|terminus_b=Titonka
|established=1931
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=229
|length_mi=5.233
|terminus_a=Garwin
|terminus_b=US 63 in Tama County
|established=1931
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=231
|noshield=yes
|length_mi=4.068
|terminus_a=US 34 west of New London
|terminus_b=US 34 east of New London
|established=2000
|decommissioned=2003
|notes=Former section of US 34
}}{{Routelist row
|state=IA
|type=IA 1961
|route=232
|length_mi=
|terminus_a=Earlham
|terminus_b=I-80 near Earlham
|established=1931
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=238
|length_mi=1.063
|terminus_a=Iowa 9 near Harris
|terminus_b=Harris
|established=1931
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=239
|length_mi=0.510
|terminus_a=Waubonsie State Park
|terminus_b=Iowa 2 in Fremont County
|established=1931
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=240
|length_mi=6.389
|terminus_a=Royal
|terminus_b=US 71 in Clay County
|established=1931
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=241
|length_mi=1.1
|terminus_a=Readlyn
|terminus_b=Iowa 3 near Readlyn
|established=1931
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=242
|length_mi=5.855
|terminus_a=US 34 in Mills County
|terminus_b=Silver City
|established=1931
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=243
|dab=1931–1980
|length_mi=8.0
|terminus_a=Iowa 140 near Kingsley
|terminus_b=Pierson
|established=1931
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=243
|length_mi=0.559
|terminus_a=Black Hawk Lake State Park
|terminus_b=US 71 / Iowa 175 near Wall Lake
|established=1980
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=244
|dab=1931–1980
|length_mi=2.0
|terminus_a=Henderson
|terminus_b=US 59
|established=1931
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=244
|length_mi=0.771
|terminus_a=I-80 near Neola
|terminus_b=Iowa 191 in Neola
|established=1980
|decommissioned=2003
|notes=
}}{{Routelist row
|state=IA
|type=IA 1961
|route=246
|length_mi=3.2
|terminus_a=US 61 in Zwingle
|terminus_b=La Motte
|established=1931
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=248
|length_mi=1.0
|terminus_a=Independence State Hospital
|terminus_b=US 20 in Independence
|established=1931
|decommissioned=1980
|notes=Hospital access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=249
|length_mi=0.665
|terminus_a=Iowa 78 near Winfield
|terminus_b=Winfield
|established=1931
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=250
|length_mi=0.6
|terminus_a=Lakota
|terminus_b=US 169 / Iowa 9 near Lakota
|established=1932
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=251
|length_mi=1.7
|terminus_a=St. Charles
|terminus_b=I-35 near St. Charles
|established=1932
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=252
|length_mi=0.584
|established=1932
|decommissioned=2003
|terminus_a=US 61 / Iowa 92 near Grandview
|terminus_b=Grandview
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=253
|length_mi=0.932
|established=1932
|decommissioned=2003
|terminus_a=Iowa 14 near Williamson
|terminus_b=Williamson
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=254
|dab=1932–1968
|length_mi=0.5
|terminus_a=Iowa 92 at Massena
|terminus_b=Massena
|established=1932
|decommissioned=1968-12-31
|notes=Spur route; became Iowa 322
}}{{Routelist row
|state=IA
|type=IA 1961
|route=254
|length_mi=7.9
|terminus_a=Iowa 9 near Buffalo Center
|terminus_b=MN 254 near Rake
|established=1969-01-01
|decommissioned=1980
|notes=Spur route; formerly Iowa 322
}}{{Routelist row
|state=IA
|type=IA 1961
|route=255
|length_mi=2.1
|terminus_a=Orchard
|terminus_b=US 218 near Orchard
|established=1932
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=256
|length_mi=0.8
|terminus_a=Iowa 17 near Corwith
|terminus_b=Corwith
|established=1932
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=258
|length_mi=1.989
|terminus_a=I-35 near Van Wert
|terminus_b=US 69 near Van Wert
|established=1933
|decommissioned=2003
|notes=
}}{{Routelist row
|state=IA
|type=IA 1961
|route=259
|length_mi=1.001
|terminus_a=US 169 near Tingley
|terminus_b=Tingley
|established=1953
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=262
|length_mi=1.7
|terminus_a=US 69 near Galt
|terminus_b=Galt
|established=1933
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=263
|length_mi=2.0
|terminus_a=Coulter
|terminus_b=Latimer
|established=1933
|decommissioned=1980
|notes=Double spur route with Iowa 3
}}{{Routelist row
|state=IA
|type=IA 1961
|route=263
|noshield=yes
|length_mi=12.511
|terminus_a=Iowa 14 in Grundy County
|terminus_b=US 20 near Cedar Falls
|established=2000
|decommissioned=2003
|notes=Former section of US 20
}}{{Routelist row
|state=IA
|type=IA 1961
|route=264
|length_mi=2.4
|terminus_a=Linn Grove
|terminus_b=Iowa 10 near Linn Grove
|established=1933
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=266
|length_mi=1.709
|terminus_a=US 69 near Weldon
|terminus_b=Weldon
|established=1934
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=267
|length_mi=1.1
|terminus_a=Iowa 93 near Randalia
|terminus_b=Randalia
|established=1934
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=269
|length_mi=3.0
|terminus_a=Iowa 16 near Stockport
|terminus_b=Stockport
|established=1934
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=270
|length_mi=1.8
|terminus_a=Iowa 16 near Hillsboro
|terminus_b=Hillsboro
|established=1934
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=271
|length_mi=0.8
|terminus_a=Iowa 4 near Yale
|terminus_b=Yale
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=273
|length_mi=10.025
|terminus_a=Lake Wapello State Park
|terminus_b=US 63 near Drakesville
|established=1935
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=276
|length_mi=4.711
|terminus_a=Spirit Lake city limits
|terminus_b=Minnesota state line
|established=1934
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=277
|length_mi=6.3
|terminus_a=Numa
|terminus_b=Iowa 5 near Centerville
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=278
|length_mi=2.1
|terminus_a=Rathbun
|terminus_b=Iowa 5 near Rathbun
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=279
|length_mi=1.983
|terminus_a=US 30 / US 218 near Atkins
|terminus_b=Atkins
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=281
|length_mi=28.166
|terminus_a=Waterloo city limits
|terminus_b=Iowa 150 at Oelwein
|established=1935
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=282
|length_mi=5.283
|terminus_a=Quasqueton
|terminus_b=Iowa 939 near Winthrop
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=284
|length_mi=5.5
|terminus_a=Aurora
|terminus_b=Iowa 187 at Lamont
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=285
|length_mi=0.796
|terminus_a=US 30 in Arcadia
|terminus_b=Arcadia
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=286
|length_mi=9.932
|terminus_a=US 30 in Glidden
|terminus_b=Lanesboro
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=287
|length_mi=1.833
|terminus_a=US 30 / US 218 near Newhall
|terminus_b=Newhall
|established=1965
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=288
|length_mi=4.6
|terminus_a=US 65 near Manly
|terminus_b=Plymouth
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=289
|length_mi=6.0
|terminus_a=Alta Vista
|terminus_b=US 63 near Lourdes
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=290
|length_mi=2.0
|terminus_a=Farmersburg
|terminus_b=Iowa 13 near Farmersburg
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=292
|length_mi=3.2
|terminus_a=Linden
|terminus_b=Iowa 44
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=293
|length_mi=1.4
|terminus_a=Iowa 90 near Van Meter
|terminus_b=Van Meter
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=294
|length_mi=6.147
|terminus_a=Iowa 2 in Decatur County
|terminus_b=Grand River
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=295
|length_mi=5.0
|terminus_a=Westgate
|terminus_b=Iowa 150 near Maynard
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=296
|dab=1935–1980
|length_mi=5.0
|terminus_a=CR C24 near Wadena
|terminus_b=Iowa 56 near Wadena
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=297
|length_mi=3.543
|terminus_a=Gilbertville
|terminus_b=Raymond
|established=1940
|decommissioned=2003
|notes=Double spur with I-380
}}{{Routelist row
|state=IA
|type=IA 1961
|route=299
|length_mi=5.556
|established=
|decommissioned=2003
|terminus_a=New Providence
|terminus_b=Iowa 175 near Eldora
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=300
|length_mi=1.411
|terminus_a=Modale
|terminus_b=I-29 near Modale
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=301
|length_mi=2.045
|terminus_a=I-29 near Little Sioux
|terminus_b=Little Sioux
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=302
|length_mi=3.0
|terminus_a=Thor
|terminus_b=Iowa 3 near Thor
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=304
|length_mi=1.6
|terminus_a=Iowa 78 near Ollie
|terminus_b=Ollie
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=305
|length_mi=2.554
|terminus_a=Letts
|terminus_b=US 61 / Iowa 92 near Letts
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=306
|length_mi=0.783
|terminus_a=US 65 near Derby
|terminus_b=Derby
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=309
|length_mi=2.3
|terminus_a=Beacon
|terminus_b=Iowa 137 in Oskaloosa
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=312
|length_mi=5.5
|terminus_a=Iowa 9 near Riceville
|terminus_b=McIntire
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=314
|length_mi=6.277
|terminus_a=Ayrshire
|terminus_b=US 18 near Ruthven
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=315
|length_mi=4.158
|terminus_a=Iowa 4 near Palmer
|terminus_b=Palmer
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=316
|length_mi=5.183
|terminus_a=Iowa 5 near Swan
|terminus_b=Runnells city limits
|established=1935
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=317
|length_mi=0.7
|terminus_a=US 65 near Zearing
|terminus_b=Zearing
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=318
|length_mi=5.5
|terminus_a=Clutier
|terminus_b=Iowa 21 near Clutier
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=319
|length_mi=0.4
|terminus_a=Gravity
|terminus_b=Iowa 148 at Gravity
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=322
|length_mi=7.9
|terminus_a=Iowa 9 near Buffalo Center
|terminus_b=MN 254 near Rake
|established=1935
|decommissioned=1968-12-31
|notes=Spur route; became Iowa 254
}}{{Routelist row
|state=IA
|type=IA 1961
|route=322
|dab=1935–1968
|length_mi=0.5
|terminus_a=Iowa 92 at Massena
|terminus_b=Massena
|established=1969-01-01
|decommissioned=1972
|notes=Spur route; formerly Iowa 254
}}{{Routelist row
|state=IA
|type=IA 1961
|route=322
|length_mi=2.660
|terminus_a=Pammel State Park
|terminus_b=Iowa 92 in Madison County
|established=1982
|decommissioned=2003
|notes=Park access road; formerly Iowa 162
}}{{Routelist row
|state=IA
|type=IA 1961
|route=323
|length_mi=3.8
|terminus_a=Iowa 17 near Woolstock
|terminus_b=Woolstock
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=324
|length_mi=0.510
|terminus_a=Iowa 175 near Onawa
|terminus_b=Lewis and Clark State Park
|established=1956
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=325
|length_mi=3.617
|terminus_a=Spillville
|terminus_b=US 52 near Calmar
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=327
|length_mi=2.070
|terminus_a=Iowa 276 in Spirit Lake
|terminus_b=near Orleans
|established=1935
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=328
|length_mi=2.3
|terminus_a=US 20 near Galva
|terminus_b=Galva
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=329
|length_mi=4.8
|terminus_a=US 169 at Boxholm
|terminus_b=Pilot Mound
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=330
|length_mi=47.748
|terminus_a=I-80 / US 6 / US 65 at Altoona
|terminus_b=Iowa 14 near Albion
|established=1969
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=331
|length_mi=1.5
|terminus_a=Eldridge
|terminus_b=US 61 near Eldridge
|established=1935
|decommissioned=1967
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=332
|length_mi=1.0
|terminus_a=Pilot Knob State Park
|terminus_b=Iowa 9 near Forest City
|established=1935
|decommissioned=1980
|notes=Park access road
}}{{routelist row
|state=IA
|type=IA
|route=333
|length_mi=1.558
|terminus_a=I-29 at Hamburg
|terminus_b=US 275 in Hamburg
|established=1935
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=334
|length_mi=1.8
|terminus_a=US 63 near Frederika
|terminus_b=Frederika
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=335
|length_mi=0.6
|terminus_a=Iowa 141 near Dawson
|terminus_b=Dawson
|established=1935
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=336
|length_mi=2.4
|terminus_a=Iowa 150 near Rowley
|terminus_b=Rowley
|established=1936
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=337
|length_mi=3.4
|terminus_a=Iowa 9 near Grafton
|terminus_b=Grafton
|established=1936
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=340
|length_mi=2.231
|terminus_a=Pikes Peak State Park
|terminus_b=Iowa 76 in McGregor
|established=1936
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=342
|length_mi=0.9
|terminus_a=Iowa 141 near Jamaica
|terminus_b=Jamaica
|established=1936
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=343
|length_mi=1.0
|terminus_a=Iowa 333 near Northboro
|terminus_b=Northboro
|established=1937
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=346
|length_mi=12.470
|terminus_a=US 218 / Iowa 27 at Nashua
|terminus_b=US 18 / US 63 near New Hampton
|established=1937
|notes=none
}}{{routelist row
|state=IA
|type=IA 1961
|route=347
|length_mi=0.8
|terminus_a=Locust Street at Omaha, Neb.
|terminus_b=Locust Street at Omaha, Neb.
|established=1937
|decommissioned=1986
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=349
|length_mi=1.032
|terminus_a=Lake Ahquabi State Park
|terminus_b=US 65 / US 69 near Indianola
|established=1938
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=353
|length_mi=0.4
|terminus_a=Rowan
|terminus_b=Iowa 3 at Rowan
|established=1938
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=356
|noshield=yes
|length_mi=0.949
|terminus_a=Milford
|terminus_b=West Okoboji
|established=2000
|decommissioned=2003
|notes=Former section of US 71
}}{{Routelist row
|state=IA
|type=IA 1961
|route=358
|length_mi=1.5
|terminus_a=Whittemore
|terminus_b= US 18 / Iowa 15 near Whittemore
|established=1938
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=359
|length_mi=7.383
|terminus_a=Buckeye
|terminus_b=Iowa 941 in Alden
|established=1938
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=362
|dab=1938–1980
|length_mi=1.1
|terminus_a=Macedonia
|terminus_b=US 59 near Macedonia
|established=1938
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=362
|length_mi=5.469
|terminus_a=DeSoto National Wildlife Refuge
|terminus_b=I-29 at Loveland
|established=1980
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=363
|length_mi=1.616
|terminus_a=Iowa 150 near Urbana
|terminus_b=I-380 / Iowa 27 in Urbana
|established=1939
|decommissioned=2003
|notes=Spur route; number approved 1938
}}{{Routelist row
|state=IA
|type=IA 1961
|route=364
|length_mi=6.140
|terminus_a=Iowa 76 near Waukon Junction
|terminus_b=Harpers Ferry
|established=1938
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=365
|length_mi=1.1
|terminus_a=Tracy
|terminus_b=Iowa 92 near Tracy
|established=1939
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=367
|length_mi=3.4
|terminus_a=Rutland
|terminus_b=US 169 near Humboldt
|established=1942
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=369
|length_mi=5.6
|terminus_a=Iowa 2 near Moulton
|terminus_b=Unionville
|established=1942
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA 1961
|route=370
|length_mi=3.265
|terminus_a=N-370 at Bellevue, Neb.
|terminus_b=I-29 / US 275 near Council Bluffs
|established=1953
|decommissioned=2014
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=371
|length_mi=0.715
|terminus_a=Lake Keomah State Park
|terminus_b=Iowa 92 near Keomah Village
|established=1939
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=374
|length_mi=8.0
|terminus_a=US 71 near Sioux Rapids
|terminus_b=Webb
|established=1942
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=376
|noshield=yes
|length_mi=10.334
|terminus_a=I-129 / US 20 / US 75 at Sioux City
|terminus_b=US 75 at Sioux City
|established=2001
|notes=US 75 Business in Sioux City
}}{{Routelist row
|state=IA
|type=IA 1961
|route=377
|length_mi=0.5
|terminus_a=Harbor Drive in Sioux City
|terminus_b=US 75 in Sergeant Bluff
|established=1942
|decommissioned=1980
|notes=Airport access road; one unsigned section was maintained until 2003
}}{{Routelist row
|state=IA
|type=IA 1961
|route=379
|length_mi=4.6
|terminus_a=Joice
|terminus_b=Iowa 105 near Lake Mills
|established=1942
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=381
|length_mi=0.7
|terminus_a=Iowa 254 near Rake
|terminus_b=Rake
|established=1954
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=382
|length_mi=4.792
|terminus_a=Lake MacBride State Park
|terminus_b=Iowa 1 in Solon
|established=1943
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=383
|length_mi=1.311
|terminus_a=US 69 near Randall
|terminus_b=Randall
|established=1944
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=384
|length_mi=1.231
|terminus_a=Iowa 25 in Guthrie County
|terminus_b=Springbrook State Park
|established=1944
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=385
|length_mi=3.151
|terminus_a=Pacific Junction
|terminus_b=US 34 / US 275 in Glenwood
|established=1945
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=386
|length_mi=2.685
|terminus_a=US 52 / Iowa 3 near Sageville
|terminus_b=US 52 / Iowa 3 / Iowa 32 near Dubuque
|established=1946
|decommissioned=2003
|notes=
}}{{Routelist row
|state=IA
|type=IA 1961
|route=387
|length_mi=1
|terminus_a=Davenport Municipal Airport
|terminus_b=US 61 3 miles north of Davenport
|established=1951
|decommissioned=1979
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=388
|length_mi=0.3
|terminus_a=Calumet
|terminus_b=US 59 at Calumet
|established=1946
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=390
|noshield=yes
|length_mi=2.113
|established=
|decommissioned=2003
|terminus_a=South of Plainfield
|terminus_b=North of Plainfield
|notes=Former section of US 218
}}{{Routelist row
|state=IA
|type=IA 1961
|route=393
|length_mi=2.3
|terminus_a=Ionia
|terminus_b=US 18 near Ionia
|established=1948
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=394
|dab=1948–1980
|length_mi=1.9
|terminus_a=Iowa 2 near Denmark
|terminus_b=Iowa Army Ammunition Plant southern entrance
|established=1948
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=394
|length_mi=10.454
|terminus_a=Route B at St. Francisville, Mo.
|terminus_b=US 218 near Donnellson
|established=1980
|decommissioned=2005
|notes=Replaced by Iowa 27
}}{{Routelist row
|state=IA
|type=IA 1961
|route=396
|length_mi=0.7
|terminus_a=Iowa 175 near Farnhamville
|terminus_b=Farnhamville
|established=1954
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=398
|length_mi=1.1
|terminus_a=Brooklyn
|terminus_b=US 6 near Brooklyn
|established=1956
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=400
|length_mi=4.5
|terminus_a=Truro
|terminus_b=I-35 near Truro
|established=1957
|decommissioned=1980
|notes=Spur route; not completed until 1958
}}{{Routelist row
|state=IA
|type=IA 1961
|route=402
|length_mi=20.9
|terminus_a=Iowa 8 near Dysart
|terminus_b=Iowa 412 in Waterloo
|established=1957
|decommissioned=1968-12-31
|notes=Replaced by Iowa 21
}}{{Routelist row
|state=IA
|type=IA 1961
|route=403
|dab=1958–1980
|length_mi=0.7
|terminus_a=Cushing
|terminus_b=US 20 near Cushing
|established=1958
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=403
|length_mi=0.477
|terminus_a=SD 48 near Akron
|terminus_b=Iowa 12 in Akron
|established=1980
|decommissioned=2003
|notes=
}}{{Routelist row
|state=IA
|type=IA 1961
|route=404
|length_mi=1.4
|terminus_a= Montrose
|terminus_b=US 61 near Montrose
|established=1980
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=404
|noshield=yes
|length_mi=1.629
|terminus_a=Iowa 3 in Le Mars
|terminus_b=US 75 at Le Mars
|established=2006
|notes=Section of US 75 Business in Le Mars
}}{{Routelist row
|state=IA
|type=IA 1961
|route=405
|length_mi=0.249
|terminus_a=Lone Tree
|terminus_b=Iowa 22 near Lone Tree
|established=1958
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=406
|length_mi=2.275
|terminus_a=US 34 near West Burlington
|terminus_b=Burlington
|established=1957
|decommissioned=2003
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA 1961
|route=407
|length_mi=0.5
|terminus_a=Iowa 99 in Oakville
|terminus_b=Oakville
|established=1957
|decommissioned=1967
|notes=Former Iowa 7; spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=408
|length_mi=7.3
|terminus_a=US 169 near Lu Verne
|terminus_b=Lu Verne
|established=1957
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=410
|length_mi=2.157
|terminus_a=Backbone State Park
|terminus_b=Iowa 3 / Iowa 13 near Strawberry Point
|established=1958
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=411
|length_mi=1.5
|established=1957
|decommissioned=1966
|terminus_a=US 6 at Marengo
|terminus_b=CR F15 north of Marengo
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=412
|length_mi=4.6
|terminus_a=US 63 in Waterloo
|terminus_b=US 218 in Waterloo
|established=1960
|decommissioned=1983
|notes=Former US 20
}}{{Routelist row
|state=IA
|type=IA 1961
|route=413
|length_mi=7.9
|terminus_a=US 20 in Fort Dodge
|terminus_b=Iowa 320 near Badger
|established=1960
|decommissioned=1980
|notes=Spur route
}}{{routelist row
|state=IA
|type=IA
|route=415
|length_mi=16.857
|terminus_a=US 6 in Des Moines
|terminus_b=Iowa 141 near Granger
|established=1959
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=417
|noshield=yes
|length_mi=9
|established=1960
|decommissioned=1969
|terminus_a=US 67 near Riverdale
|terminus_b=US 67 near LeClaire
|notes=Former section of US 67
}}{{Routelist row
|state=IA
|type=IA 1961
|route=419
|length_mi=1.038
|terminus_a=Victor
|terminus_b=US 6 / Iowa 21 near Victor
|established=1962
|decommissioned=2003
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=424
|dab=1961–1980
|length_mi=0.8
|terminus_a=Iowa 111 in Britt
|terminus_b=US 18 near Britt
|established=1961
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=424
|noshield=yes
|length_mi=2.802
|terminus_a=South of Swedesburg
|terminus_b=US 218 near Olds
|established=1999
|decommissioned=2003
|notes=Former section of US 218
}}{{Routelist row
|state=IA
|type=IA 1961
|route=428
|length_mi=
|terminus_a=Anamosa
|terminus_b=US 151 near Anamosa
|established=1965
|decommissioned=1980
|notes=Spur route
}}{{Routelist row
|state=IA
|type=IA 1961
|route=428
|length_mi=6.140
|terminus_a=Maquoketa Caves State Park
|terminus_b=US 61 near Maquoketa
|established=1980
|decommissioned=2003
|notes=Park access road
}}{{routelist row
|state=IA
|type=IA
|route=438
|noshield=yes
|length_mi=1.052
|terminus_a=US 34 / Iowa 163 at Mount Pleasant
|terminus_b=US 218 / Iowa 27 at Mount Pleasant
|established=2003
|notes=Section of US 218 Business in Mount Pleasant
}}{{routelist row
|state=IA
|type=IA
|route=461
|noshield=yes
|length_mi=10.750
|terminus_a=I-280 / US 61 at Davenport
|terminus_b=I-80 / US 61 at Davenport
|established=2010
|notes=US 61 Business in Davenport
}}{{routelist row
|state=IA
|type=IA
|route=471
|length_mi=11.160
|terminus_a=Iowa 175 near Lake View
|terminus_b=US 20 / US 71 near Early
|established=2015
|notes=Former US 71 in Sac County
}}{{Routelist row
|state=IA
|type=IA 1961
|route=478
|noshield=yes
|length_mi=0.755
|terminus_a=Iowa 24 in New Hampton
|terminus_b=North of New Hampton
|established=2002
|decommissioned=2003
|notes=Former section of US 63
}}{{routelist row
|state=IA
|type=IA 1961
|route=904
|noshield=yes
|length_mi=4.737
|terminus_a=US 34 / Iowa 163 west of Fairfield
|terminus_b=US 34 / Iowa 163 east of Fairfield
|established=2008
|decommissioned=2011
|notes=US 34 Business at Fairfield, did not count mileage within Fairfield city limits
}}{{Routelist row
|state=IA
|type=IA
|route=906
|noshield=yes
|length_mi=4.009
|terminus_a=Iowa 192 in Council Bluffs
|terminus_b=I-80 / US 6 near Council Bluffs
|established=2016
|notes=Former US 6 through Council Bluffs
}}{{Routelist row
|state=IA
|type=IA 1961
|route=916
|noshield=yes
|length_mi=1.293
|terminus_a=Iowa 281 in Oelwein
|terminus_b=Oelwein
|established=1986
|decommissioned=2003
|notes=Former section of Iowa 150
}}{{Routelist row
|state=IA
|type=IA 1961
|route=920
|length_mi=12.560
|terminus_a=Center Point
|terminus_b=Iowa 150 near Urbana
|established=1984
|decommissioned=2003
|notes=Former section of Iowa 150
}}{{routelist row
|state=IA
|type=IA
|route=922
|noshield=yes
|length_mi=8.862
|terminus_a=US 151 at Cedar Rapids
|terminus_b=Iowa 100 in Cedar Rapids
|established=1985
|notes=US 151 Business in Cedar Rapids
}}{{Routelist row
|state=IA
|type=IA 1961
|route=925
|length_mi=26.259
|terminus_a=I-80 / US 6 in Adair
|terminus_b=US 6 near Dexter
|established=1981
|decommissioned=2003
|notes=Former section of US 6
}}{{routelist row
|state=IA
|type=IA 1961
|route=926
|noshield=yes
|length_mi=3.147
|terminus_a=US 169 / US 20 Bus at Fort Dodge
|terminus_b=US 169 at Fort Dodge
|established=1990
|decommissioned=2014
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=927
|noshield=yes
|length_mi=19.017
|terminus_a=US 6 / Iowa 38 in Wilton
|terminus_b=I-280 / US 6 near Davenport
|established=1981
|decommissioned=2003
|notes=Former section of US 6
}}{{Routelist row
|state=IA
|type=IA 1961
|route=928
|noshield=yes
|length_mi=20.168
|terminus_a=Iowa 17 near Webster City
|terminus_b=CR D20 near Williams
|established=1980
|decommissioned=2003
|notes=Former section of US 20
}}{{Routelist row
|state=IA
|type=IA 1961
|route=929
|noshield=yes
|length_mi=0.789
|terminus_a=Murray city limits
|terminus_b=Maple Street in Murray
|established=1980
|decommissioned=2003
|notes=Former section of Iowa 152
}}{{routelist row
|state=IA
|type=IA
|route=930
|noshield=yes
|length_mi=1.738
|terminus_a=US 30 near Ames
|terminus_b=Boone–Story county line
|established=1972
|notes=Unsigned highway
}}{{Routelist row
|state=IA
|type=IA 1961
|route=931
|length_mi=8.962
|terminus_a=I-35 in Ankeny
|terminus_b=US 65 in Polk County
|established=1980
|decommissioned=2003
|notes=
}}{{routelist row
|state=IA
|type=IA
|route=934
|noshield=yes
|length_mi=4.881
|terminus_a=Iowa 58 in Cedar Falls
|terminus_b=US 63 in Waterloo
|established=1998
|decommissioned=2016
|notes=Was an unsigned highway
}}{{Routelist row
|state=IA
|type=IA 1961
|route=939
|noshield=yes
|length_mi=18.931
|established=1980
|decommissioned=2003
|terminus_a=Iowa 187 near Masonville
|terminus_b=Black Hawk–Buchanan county line
|notes=Former section of US 20
}}{{Routelist row
|state=IA
|type=IA 1961
|route=940
|noshield=yes
|length_mi=0.081
|terminus_a=Tama–Benton county line near Belle Plaine
|terminus_b=Iowa 21 near Belle Plaine
|established=1981
|decommissioned=2003
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=941
|noshield=yes
|length_mi=12.953
|terminus_a=I-35 near Williams
|terminus_b=Iowa Falls city limits
|established=1991
|decommissioned=2003
|notes=Former section of US 20
}}{{Routelist row
|state=IA
|type=IA 1961
|route=942
|noshield=yes
|length_mi=0.466
|terminus_a=Vine Street in Woodburn
|terminus_b=Woodburn city limits
|established=1980
|decommissioned=2003
|notes=Former section of Iowa 104
}}{{Routelist row
|state=IA
|type=IA 1961
|route=944
|noshield=yes
|length_mi=0.553
|terminus_a=US 61 / Iowa 2 in Fort Madison
|terminus_b=Fort Madison city limits
|established=1980
|decommissioned=2003
|notes=Former section of Iowa 88
}}{{Routelist row
|state=IA
|type=IA 1961
|route=945
|length_mi=4.599
|terminus_a=I-80 near Altoona
|terminus_b=Iowa 931 in Polk County
|established=1980
|decommissioned=2003
|notes=none
}}{{routelist row
|state=IA
|type=IA
|route=946
|noshield=yes
|length_mi=0.927
|terminus_a=US 52 / US 61 / US 151 in Dubuque
|terminus_b=US 52 / US 61 / US 151 in Dubuque
|established=1991
|notes=Provides direct access between US 20 and US 52 / US 61 / US 151
}}{{Routelist row
|state=IA
|type=IA 1961
|route=949
|noshield=yes
|length_mi=2.275
|terminus_a=Glenwood city limits
|terminus_b=US 34 / US 275 near Glenwood
|established=1974
|decommissioned=2003-02-18
|notes=Former US 34 Business
}}{{Routelist row
|state=IA
|type=IA 1961
|route=952
|noshield=yes
|length_mi=0.112
|terminus_a=US 151 near Cascade
|terminus_b=Reiter Road near Cascade
|established=1992
|decommissioned=2003
|notes=Former section of US 151
}}{{Routelist row
|state=IA
|type=IA 1961
|route=954
|noshield=yes
|length_mi=0.773
|terminus_a=US 61 near Maquoketa
|terminus_b=Maquoketa city limits
|established=1967
|decommissioned=2003
|notes=Former section of US 61
}}{{Routelist row
|state=IA
|type=IA 1961
|route=955
|noshield=yes
|length_mi=0.727
|terminus_a=US 61 near Key West
|terminus_b=Military Road in Key West
|established=1976
|decommissioned=2003
|notes=Former section of US 61
}}{{Routelist row
|state=IA
|type=IA 1961
|route=956
|noshield=yes
|length_mi=16.776
|terminus_a=CR F55 at Davenport
|terminus_b=US 61 north of DeWitt
|established=1976
|decommissioned=2003
|notes=Former section of US 61
}}{{routelist row
|state=IA
|type=IA 1961
|route=961
|noshield=yes
|length_mi=3.613
|terminus_a=Iowa 2 in Fort Madison
|terminus_b=US 61 at Fort Madison
|established=2011
|decommissioned=2013
|notes=Section of US 61 Business in Fort Madison
}}{{Routelist row
|state=IA
|type=IA 1961
|route=963
|noshield=yes
|length_mi=4.139
|terminus_a=US 151 near Key West
|terminus_b=US 61 / US 151 in Dubuque
|established=1971
|decommissioned=2003
|notes=Former section of US 151 and US 61
}}{{routelist row
|state=IA
|type=IA
|route=965
|noshield=yes
|length_mi=0.519
|terminus_a=US 6 in Coralville
|terminus_b=I-80 in Coralville
|established=1985
|notes=none
}}{{Routelist row
|state=IA
|type=IA 1961
|route=967
|noshield=yes
|length_mi=0.037
|terminus_a=US 20 near Farley
|terminus_b=Farley city limits
|established=1976
|decommissioned=2003
|notes=Former section of US 20
}}{{Routelist row
|state=IA
|type=IA 1961
|route=977
|noshield=yes
|length_mi=2.007
|terminus_a=US 59 in Cherokee
|terminus_b=Iowa 3 near Cherokee
|established=1964
|decommissioned=2003
|notes=
}}{{Routelist row
|state=IA
|type=IA 1961
|route=978
|noshield=yes
|length_mi=2.772
|terminus_a=I-29 / US 34 near Glenwood
|terminus_b=Iowa 385 near Pacific Junction
|established=1974
|decommissioned=2003-02-18
|notes=Former section of US 34
}}{{Routelist row
|state=IA
|type=IA 1961
|route=982
|noshield=yes
|length_mi=27.787
|terminus_a=Smithland city limits
|terminus_b=Sioux City city limits
|established=1961
|decommissioned=2003
|notes=Former section of Iowa 141
}}{{Routelist row
|state=IA
|type=IA 1961
|route=985
|noshield=yes
|length_mi=1.927
|terminus_a=US 52 near Bellevue State Park
|terminus_b=US 52 near Bellevue
|established=1980
|decommissioned=2003
|notes=Park access road
}}{{Routelist row
|state=IA
|type=IA 1961
|route=988
|length_mi=2.312
|terminus_a=I-29 / I-680 near Crescent
|terminus_b=Iowa 183 in Crescent
|established=1975
|decommissioned=2003
|notes=
}}{{routelist bottom|keys=former}}

References

1. ^{{IowaDOT|2013-11-06|year=2012}}
2. ^¹²³⁴⁵⁶⁷{{cite journal|title=U.S. Road Markers Soon to Replace Familiar Primary Road Signs on U.S. System in Iowa|publisher=Iowa State Highway Commission|journal=Service Bulletin Oct–Nov–Dec 1925|issue=10–11–12|volume=XIII|date=1925|p=3}}

3 : State highways in Iowa|Lists of roads in Iowa|Iowa transportation-related lists

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