In 1923, Ohio renumbered almost all of its state highways in order to simplify the system.[1]
| Old | New | Now | From | To | | 0011|1 National Road}} | 00101|State Route 1 (Ohio 1923) State Route 1}} | US 40 | Indiana | Pennsylvania |
| 0021|2 Cleveland-Buffalo Road}} | 00211|State Route 2 (Ohio 1923) State Route 2}} | US 20 | Cleveland | Pennsylvania |
| 0031|3 Cleveland-Sandusky Road}} | 01202|State Route 12 (Ohio 1923) State Route 12}} | US 6 | Cleveland | Sandusky |
| 0041|4 Columbus-Sandusky Road}} | 00402|State Route 4 (Ohio 1923) State Route 4}} | US 23 | Columbus | Waldo |
| 0042|4 Columbus-Sandusky Road}} | 09801|State Route 98 (Ohio 1923) State Route 98}} | SR 98 | Waldo | Bucyrus |
| 0043|4 Columbus-Sandusky Road}} | 00405|State Route 4 (Ohio 1923) State Route 4}} | SR 4 | Bucyrus | Sandusky |
| 0051|5 Portsmouth-Columbus Road}} | 00401|State Route 4 (Ohio 1923) State Route 4}} | US 23 | Portsmouth | Columbus |
| 0061|6 Columbus-Cincinnati Road}} | 02802|State Route 28 (Ohio 1923) State Route 28}} | SR 142, US 42 | West Jefferson | Sharonville |
| 0071|7 Ohio River Road}} | 00702|State Route 7 (Ohio 1923) State Route 7}} | US 52, SR 7 | Cincinnati | Pomeroy |
| 0072|7 Ohio River Road}} | 14402|State Route 144 (Ohio 1923) State Route 144}} | SR 124 | Hockingport | Little Hocking |
| 0073|7 Ohio River Road}} | 00704|State Route 7 (Ohio 1923) State Route 7}} | SR 7 | Little Hocking | East Liverpool |
| 0074|7 Ohio River Road}} | 00517|State Route 5 (Ohio 1923) State Route 5}} | SR 39 | East Liverpool | Pennsylvania |
| 0081|8 Cincinnati-Chillicothe Road}} | 02701|State Route 27 (Ohio 1923) State Route 27}} | US 50, SR 28 | Cincinnati | Chillicothe |
| 0091|9 Milford-Hillsboro Road}} | 02603|State Route 26 (Ohio 1923) State Route 26}} | US 50 | Milford | Hillsboro |
| 0101|10 Cincinnati-Zanesville Road}} | 00301|State Route 3 (Ohio 1923) State Route 3}} | SR 3/US 22 | Cincinnati | Washington Court House |
| 0102|10 Cincinnati-Zanesville Road}} | 04001|State Route 40 (Ohio 1923) State Route 40}} | US 22 | Washington Court House | Zanesville |
| 0111|11 Toledo-Detroit Road}} | 00613|State Route 6 (Ohio 1923) State Route 6}} | US 25 (former) | Toledo | Michigan |
| 0121|12 Cleveland-East Liverpool Road}} | 01401|State Route 14 (Ohio 1923) State Route 14}} | SR 14 | Cleveland | Salem |
| 0122|12 Cleveland-East Liverpool Road}} | 04501|State Route 45 (Ohio 1923) State Route 45}} | SR 45 | Salem | Lisbon |
| 0123|12 Cleveland-East Liverpool Road}} | 00516|State Route 5 (Ohio 1923) State Route 5}} | US 30 | Lisbon | East Liverpool |
| 0131|13 Youngstown-Conneaut Road}} | 00707|State Route 7 (Ohio 1923) State Route 7}} | SR 7 | Hubbard | Conneaut |
| 0141|14 Youngstown-Lowellville Road}} | 01805|State Route 18 (Ohio 1923) State Route 18}} | SR 289 | Youngstown | Pennsylvania |
| 0151|15 Cleveland-Meadville Road}} | 01501|State Route 15 (Ohio 1923) State Route 15}} | US 322 | Cleveland | Pennsylvania |
| 0161|16 Akron-Cleveland Road}} | 00808|State Route 8 (Ohio 1923) State Route 8}} | SR 8 | Akron | Cleveland |
| 0171|17 Cleveland-Massillon Road}} | 01307|State Route 13 (Ohio 1923) State Route 13}} | SR 21 | Cleveland | Massillon |
| 0181|18 Akron-Youngstown Road}} | 01804|State Route 18 (Ohio 1923) State Route 18}} | SR 18 (former) | Akron (east of) | Youngstown |
| 0191|19 Cincinnati-Dayton Road}} | 02801|State Route 28 (Ohio 1923) State Route 28}} | US 42 | Cincinnati | Sharonville |
| 0192|19 Cincinnati-Dayton Road}} | 12401|State Route 124 (Ohio 1923) State Route 124}} | US 25 (former) | Sharonville | Franklin |
| 0193|19 Cincinnati-Dayton Road}} | 00603|State Route 6 (Ohio 1923) State Route 6}} | US 25 (former) | Franklin | Dayton |
| 0201|20 Toledo-Wauseon Road}} | 00203|State Route 2 (Ohio 1923) State Route 2}} | SR 2 | Toledo | Wauseon |
| 0211|21 Toledo-Angola Road}} | 02301|State Route 23 (Ohio 1923) State Route 23}} | US 20, SR 120 | Toledo | Indiana |
| 0221|22 Lima-Sandusky Road}} | 00609|State Route 6 (Ohio 1923) State Route 6}} | US 25 (former) | Lima | Findlay |
| 0222|22 Lima-Sandusky Road}} | 01201|State Route 12 (Ohio 1923) State Route 12}} | SR 12, US 6 | Findlay | Sandusky |
| 0231|23 Columbus-Millersburg Road}} | 01901|State Route 19 (Ohio 1923) State Route 19}} | US 62 | Columbus | Millersburg |
| 0241|24 Columbus-Wooster Road}} | 00303|State Route 3 (Ohio 1923) State Route 3}} | SR 3 | Columbus | Wooster |
| 0251|25 Cleveland-Wooster Road}} | 00304|State Route 3 (Ohio 1923) State Route 3}} | SR 3, US 42 | Cleveland | Wooster |
| 0261|26 Steubenville-Cambridge Road}} | 04901|State Route 49 (Ohio 1923) State Route 49}} | US 22 | Steubenville | Cambridge |
| 0271|27 Dayton-Lakeview Road}} | 20101|State Route 201 (Ohio 1923) State Route 201}} | SR 201 | Dayton | Brandt |
| 0272|27 Dayton-Lakeview Road}} | 06902|State Route 69 (Ohio 1923) State Route 69}} | SR 235 | East of Brandt | Lakeview |
| 0281|28 Dayton-Indianapolis Road}} | 01102|State Route 11 (Ohio 1923) State Route 11}} | US 35 | Dayton | Eaton |
| 0282|28 Dayton-Indianapolis Road}} | 1221|State Route 122 (Ohio 1923) State Route 122}} | SR 122 | Eaton | Indiana |
| 0291|29 Dayton-Chillicothe Road}} | 01103|State Route 11 (Ohio 1923) State Route 11}} | US 35 | Dayton | Chillicothe |
| 0301|30 Cincinnati-West Union Road}} | 02501|State Route 25 (Ohio 1923) State Route 25}} | SR 125 | Cincinnati | West Union |
| 0311|31 Cleveland-Elyria Road}} | 00210|State Route 2 (Ohio 1923) State Route 2}} | US 20 | Cleveland | Elyria |
| 0321|32 Cleveland-Hinckley-Medina Road}} | 05508|State Route 55 (Ohio 1923) State Route 55}} | SR 94, SR 3 | Cleveland | Medina |
| 0331|33 Cleveland-Burton Road}} | 01600|State Route 16 (Ohio 1923) State Route 16}} | US 422 | Cleveland | Chagrin Falls (west of) |
| 0332|33 Cleveland-Burton Road}} | 08701|State Route 87 (Ohio 1923) State Route 87}} | SR 87 | Chagrin Falls (west of) | Burton |
| 0341|34 Euclid-Chardon Road}} | 08501|State Route 85 (Ohio 1923) State Route 85}} | US 6 | Euclid | Chardon |
| 0351|35 Chagrin Falls-Greenville Road}} | 01601|State Route 16 (Ohio 1923) State Route 16}} | US 422 | Chagrin Falls (west of) | Parkman |
| 0352|35 Chagrin Falls-Greenville Road}} | 08703|State Route 87 (Ohio 1923) State Route 87}} | SR 88 | Parkman | Pennsylvania |
| 0361|36 Twinsburg-Elyria Road}} | 08101|State Route 81 (Ohio 1923) State Route 81}} | SR 82 | Twinsburg | Elyria (south of) |
| 0371|37 Rocky River-Berea Road}} | 23201|State Route 232 (Ohio 1923) State Route 232}} | SR 237, Eastland Road, Fowles Road | Rocky River | Berea (east of) |
| 0381|38 Cincinnati-Louisville Road}} | 00701|State Route 7 (Ohio 1923) State Route 7}} | SR 264, US 50 | Cincinnati | Indiana |
| 0391|39 Cincinnati-Hamilton Road}} | 00901|State Route 9 (Ohio 1923) State Route 9}} | US 127 | Cincinnati | Hamilton |
| 0401|40 Cincinnati-Brookville Road}} | 12901|State Route 129 (Ohio 1923) State Route 129}} | US 27, SR 126 | Cincinnati | Indiana |
| 0411|41 Cincinnati-Batavia Road}} | 07401|State Route 74 (Ohio 1923) State Route 74}} | SR 32 | Cincinnati | Batavia |
| 0421|42 Harrison Road}} | 13001|State Route 130 (Ohio 1923) State Route 130}} | US 52 | Cincinnati | Indiana |
| 0431|43 Carthage-Hamilton Road}} | 00601|State Route 6 (Ohio 1923) State Route 6}} | SR 4 | Carthage | Hamilton |
| 0441|44 Hamilton-Cleves Road}} | 12801|State Route 128 (Ohio 1923) State Route 128}} | SR 128 | Hamilton | Cleves |
| 0451|45 Dunlap-Springdale Road}} | 02601|State Route 26 (Ohio 1923) State Route 26}} | SR 126 | Dunlap | Springdale |
| 0461|46 Glendale-Milford Road}} | 02602|State Route 26 (Ohio 1923) State Route 26}} | SR 126 | Glendale | Milford |
| 0471|47 Columbus-Newark Road}} | 02001|State Route 20 (Ohio 1923) State Route 20}} | SR 16 | Columbus | Newark |
| 0481|48 Columbus-Marysville Road}} | 02103|State Route 21 (Ohio 1923) State Route 21}} | US 33 | Columbus | Marysville |
| 0491|49 Columbus-Lancaster Road}} | 02104|State Route 21 (Ohio 1923) State Route 21}} | US 33 | Columbus | Lancaster |
| 0501|50 Columbus-Washington Court House Road}} | 00302|State Route 3 (Ohio 1923) State Route 3}} | SR 3/US 62 | Columbus | Washington Court House |
| 0511|51 Toledo-Napoleon Road}} | 03101|State Route 31 (Ohio 1923) State Route 31}} | US 24 | Toledo | Napoleon |
| 0521|52 Toledo-Elmore Road}} | 00204|State Route 2 (Ohio 1923) State Route 2}} | SR 51 | Toledo | Southeast of Woodville |
| 0531|53 Toledo-Perrysburg Road}} | 00612|State Route 6 (Ohio 1923) State Route 6}} | SR 65 | Toledo | Perrysburg |
| 0532|53 Toledo-Perrysburg Road}} | 11003|State Route 110 (Ohio 1923) State Route 110}} | SR 65 | Perrysburg | Grand Rapids |
| 0541|54 Toledo-Lansing Road}} | 11201|State Route 112 (Ohio 1923) State Route 112}} | SR 51 | Toledo | Michigan |
| 0551|55 Toledo-Ann Arbor Road}} | 18301|State Route 183 (Ohio 1923) State Route 183}} | SR 246, Secor Road | Toledo | Michigan |
| 0561|56 Jerusalem Road}} | 02302|State Route 23 (Ohio 1923) State Route 23}} | SR 2 | Toledo | Bono |
| 0571|57 Perrysburg-Holland Road}} | 10201|State Route 102 (Ohio 1923) State Route 102}} | US 20, Perrysburg Holland Road | Perrysburg | Holland |
| 0581|58 Holland-Sylvania Road}} | 06304|State Route 63 (Ohio 1923) State Route 63}} | US 20, Holland Sylvania Road | Southeast of Holland | Sylvania |
| 0591|59 Waterville-Swanton Road}} | 06402|State Route 64 (Ohio 1923) State Route 64}} | SR 64 | Waterville | Swanton |
| 0601|60 Dayton-Springfield Road}} | 05203|State Route 52 (Ohio 1923) State Route 52}} | SR 4 | Dayton | Springfield |
| 0611|61 Dayton-Troy Road}} | 00604|State Route 6 (Ohio 1923) State Route 6}} | US 25 (former) | Dayton | Troy |
| 0621|62 Dayton-Greenville Road}} | 05101|State Route 51 (Ohio 1923) State Route 51}} | SR 49 | Dayton | Greenville |
| 0631|63 Dayton-Covington Road}} | 05002|State Route 50 (Ohio 1923) State Route 50}} | SR 48 | Dayton | Covington (north of) |
| 0641|64 Dayton-Lebanon Road}} | 05001|State Route 50 (Ohio 1923) State Route 50}} | SR 48 | Dayton | Lebanon |
| 0651|65 Dayton-Germantown Road}} | 05202|State Route 52 (Ohio 1923) State Route 52}} | SR 4 | Dayton | Germantown |
| 0661|66 Akron-Canton Road}} | 00807|State Route 8 (Ohio 1923) State Route 8}} | SR 8 (former) | Akron | Canton |
| 0671|67 Canton-Alliance Road}} | 04401|State Route 44 (Ohio 1923) State Route 44}} | US 62 | Canton | Louisville (north of) |
| 0672|67 Canton-Alliance Road}} | 01907|State Route 19 (Ohio 1923) State Route 19}} | US 62, SR 193 (former) | Louisville (north of) | Alliance |
| 0681|68 Canton-Massillon Road}} | 00511|State Route 5 (Ohio 1923) State Route 5}} | SR 172 | Canton | Massillon |
| 0691|69 Massillon-Wooster Road}} | 00510|State Route 5 (Ohio 1923) State Route 5}} | US 30, SR 172 | Massillon | Wooster |
| 0701|70 Canton-Canal Dover Road}} | 00806|State Route 8 (Ohio 1923) State Route 8}} | SR 800 | Canton | New Philadelphia |
| 0711|71 Akron-Massillon Road}} | 09301|State Route 93 (Ohio 1923) State Route 93}} | SR 93, SR 236 | Akron | Massillon |
| 0721|72 Canton-New Franklin Road}} | 00512|State Route 5 (Ohio 1923) State Route 5}} | SR 172 | Canton | Osnaburg |
| 0722|72 Canton-New Franklin Road}} | 17201|State Route 172 (Ohio 1923) State Route 172}} | SR 172 | Osnaburg | New Franklin |
| 0731|73 Canton-Louisville Road}} | 01905|State Route 19 (Ohio 1923) State Route 19}} | SR 153 | Canton | Louisville |
| 0741|74 Ravenna-Louisville Road}} | 04402|State Route 44 (Ohio 1923) State Route 44}} | SR 44 | Ravenna | Louisville (north of) |
| 0742|74 Ravenna-Louisville Road}} | 01906|State Route 19 (Ohio 1923) State Route 19}} | SR 44 | Louisville (north of) | Louisville |
| 0751|75 Canton-Steubenville Road}} | 04301|State Route 43 (Ohio 1923) State Route 43}} | SR 43 | Canton | Waynesburg |
| 0752|75 Canton-Steubenville Road}} | 17101|State Route 171 (Ohio 1923) State Route 171}} | SR 171 | Waynesburg | Carrollton |
| 0753|75 Canton-Steubenville Road}} | 04304|State Route 43 (Ohio 1923) State Route 43}} | SR 43 | Carrollton | Steubenville |
| 0761|76 Alliance-Yale Road}} | 08002|State Route 80 (Ohio 1923) State Route 80}} | SR 225 | Alliance | East of Atwater Center |
| 0762|76 Alliance-Yale Road}} | 22501|State Route 225 (Ohio 1923) State Route 225}} | SR 225 (former) | East of Atwater Center | Yale |
| 0771|77 Massillon-Canal Dover Road}} | 01306|State Route 13 (Ohio 1923) State Route 13}} | SR 21 | Massillon | Northwest of Strasburg |
| 0781|78 Alliance-Minerva Road}} | 08001|State Route 80 (Ohio 1923) State Route 80}} | SR 183 | Alliance | Minerva |
| 0791|79 Navarre-Berlin Road}} | 01903|State Route 19 (Ohio 1923) State Route 19}} | US 62 | Navarre | Berlin |
| 0801|80 Youngstown-Warren Road}} | 01604|State Route 16 (Ohio 1923) State Route 16}} | US 422 | Youngstown | Girard |
| 0802|80 Youngstown-Warren Road}} | 16901|State Route 169 (Ohio 1923) State Route 169}} | US 422 | Girard | Warren |
| 0811|81 Youngstown-Salem Road}} | 01909|State Route 19 (Ohio 1923) State Route 19}} | US 62 | Youngstown | Salem |
| 0821|82 Youngstown-Lisbon Road}} | 16402|State Route 164 (Ohio 1923) State Route 164}} | SR 164, SR 7 | Youngstown | Lisbon |
| 0831|83 Pittsburg-Youngstown Road}} | 09001|State Route 90 (Ohio 1923) State Route 90}} | SR 170, SR 617 | Pennsylvania | Youngstown |
| 0841|84 Alliance-Salem Road}} | 01908|State Route 19 (Ohio 1923) State Route 19}} | US 62, SR 173 (former) | Alliance | Salem |
| 0851|85 Youngstown-New Bedford Road}} | 01605|State Route 16 (Ohio 1923) State Route 16}} | US 422 | Youngstown | Pennsylvania |
| 0861|86 Salem-Unity Road}} | 01402|State Route 14 (Ohio 1923) State Route 14}} | SR 14 | Salem | Unity |
| 0862|86 Salem-Unity Road}} | 17001|State Route 170 (Ohio 1923) State Route 170}} | SR 14 | Unity | Pennsylvania |
| 0871|87 Akron-Canfield Road}} | 01713|State Route 17 (Ohio 1923) State Route 17}} | US 224 | Akron | Canfield |
| 0881|88 Niles-Warren Road}} | 01603|State Route 16 (Ohio 1923) State Route 16}} | SR 169 | Girard | Warren |
| 0891|89 North Lima-East Palestine Road}} | 16501|State Route 165 (Ohio 1923) State Route 165}} | SR 165 | North Lima | Unity |
| 0892|89 North Lima-East Palestine Road}} | 01403|State Route 14 (Ohio 1923) State Route 14}} | SR 165 | Unity | East Palestine |
| 0901|90 Chagrin Falls-Willoughby Road}} | 17402|State Route 174 (Ohio 1923) State Route 174}} | SR 174 | Chagrin Falls | Willoughby |
| 0911|91 Cuyahoga Falls-Chagrin Falls Road}} | 09101|State Route 91 (Ohio 1923) State Route 91}} | SR 91 | Cuyahoga Falls | Solon |
| 0912|91 Cuyahoga Falls-Chagrin Falls Road}} | 17401|State Route 174 (Ohio 1923) State Route 174}} | SR 174 (former) | Solon | Chagrin Falls |
| 0921|92 Akron-Cuyahoga Falls Road}} | 03602|State Route 36 (Ohio 1923) State Route 36}} | SR 59 | Akron | Cuyahoga Falls |
| 0931|93 Cuyahoga Falls-Kent Road}} | 03603|State Route 36 (Ohio 1923) State Route 36}} | SR 59 | Cuyahoga Falls | Kent |
| 0941|94 Akron-Kent Road}} | 03611|State Route 36 (Ohio 1923) State Route 36}} | SR 261 | Akron | Kent |
| 0951|95 Akron-Medina Road}} | 01802|State Route 18 (Ohio 1923) State Route 18}} | SR 18 | Akron | Medina |
| 0961|96 Akron-Wooster Road}} | 03601|State Route 36 (Ohio 1923) State Route 36}} | SR 585 | Akron | Wooster |
| 0971|97 Barberton-Greenwich Road}} | 01710|State Route 17 (Ohio 1923) State Route 17}} | US 224 | Barberton | Chicago Junction |
| 0981|98 Ghent Road}} | 09201|State Route 92 (Ohio 1923) State Route 92}} | SR 176 (former) | Northwest of Akron | Ghent |
| 0991|99 High Ridge-Bellaire Road}} | 21401|State Route 214 (Ohio 1923) State Route 214}} | SR 214 (former) | St. Clairsville (east of) | Bellaire |
| 1001|100 Bridgeport-Cadiz Road}} | 01301|State Route 13 (Ohio 1923) State Route 13}} | US 250 | Bridgeport | Cadiz |
| 1011|101 Barnesville-Hendrysburg Road}} | 04803|State Route 48 (Ohio 1923) State Route 48}} | SR 800 | Barnesville | Hendrysburg |
| 1021|102 Cadiz-St. Clairsville Road}} | 03504|State Route 35 (Ohio 1923) State Route 35}} | SR 9 | Cadiz | St. Clairsville |
| 1031|103 New Athens-Morristown Road}} | 14901|State Route 149 (Ohio 1923) State Route 149}} | SR 149 | New Athens | Morristown |
| 1041|104 Barnesville-Woodsfield Road}} | 04802|State Route 48 (Ohio 1923) State Route 48}} | SR 800 | Barnesville | Woodsfield |
| 1051|105 Barnesville-Powhatan Road}} | 14802|State Route 148 (Ohio 1923) State Route 148}} | SR 148 | Barnesville | Powhatan Point |
| 1061|106 St. Clairsville-Armstrong Mills Road}} | 03503|State Route 35 (Ohio 1923) State Route 35}} | SR 9 | St. Clairsville | Armstrongs Mills |
| 1071|107 Cambridge-Barnesville Road}} | 14801|State Route 148 (Ohio 1923) State Route 148}} | SR 265 | Cambridge | Barnesville |
| 1081|108 Malaga-Alledonia Road}} | 03501|State Route 35 (Ohio 1923) State Route 35}} | SR 145 | Malaga | Alledonia |
| 1091|109 Marion-Waldo Road}} | 00403|State Route 4 (Ohio 1923) State Route 4}} | SR 423 | Marion | Waldo |
| 1101|110 Marion-Bucyrus Road}} | 00404|State Route 4 (Ohio 1923) State Route 4}} | SR 4 | Marion | Bucyrus |
| 1111|111 Marion-Mount Gilead Road}} | 04201|State Route 42 (Ohio 1923) State Route 42}} | SR 95 | Marion | Mount Gilead |
| 1121|112 Marion-Kenton Road}} | 01003|State Route 10 (Ohio 1923) State Route 10}} | SR 309 | Kenton | Marion |
| 1131|113 Marion-Upper Sandusky Road}} | 02206|State Route 22 (Ohio 1923) State Route 22}} | US 23, SR 199, SR 423 | Marion | Upper Sandusky |
| 1141|114 Marion-Galion Road}} | 01004|State Route 10 (Ohio 1923) State Route 10}} | SR 309 | Marion | Galion |
| 1151|115 Marysville-Marion Road}} | 03806|State Route 38 (Ohio 1923) State Route 38}} | SR 4 | Marysville | Marion |
| 1161|116 Delaware-Prospect Road}} | 20301|State Route 203 (Ohio 1923) State Route 203}} | SR 203 | Delaware | North of Prospect |
| 1171|117 Richwood-Larue Road}} | 04703|State Route 47 (Ohio 1923) State Route 47}} | SR 37 | South of Richwood | LaRue |
| 1181|118 Larue-Marseilles Road}} | 04704|State Route 47 (Ohio 1923) State Route 47}} | SR 37 | LaRue | Marseilles |
| 1191|119 West Union-Portsmouth Road}} | 02502|State Route 25 (Ohio 1923) State Route 25}} | SR 125 | West Union | Portsmouth (west of) |
| 1201|120 West Union-Bradysville Road}} | 04101|State Route 41 (Ohio 1923) State Route 41}} | SR 41, SR 136 | West Union | Manchester |
| 1211|121 West Union-Wrightsville Road}} | 13701|State Route 137 (Ohio 1923) State Route 137}} | SR 247 | West Union | Wrightsville |
| 1221|122 West Union-Belfast Road}} | 13702|State Route 137 (Ohio 1923) State Route 137}} | SR 247, SR 785 | West Union | Belfast |
| 1231|123 Hillsboro-Portsmouth Road}} | 07303|State Route 73 (Ohio 1923) State Route 73}} | SR 73 | Hillsboro | Portsmouth (north of) |
| 1241|124 West Union-Sinking Spring Road}} | 04102|State Route 41 (Ohio 1923) State Route 41}} | SR 41 | West Union | Bainbridge |
| 1251|125 Batavia-Winchester Road}} | 07402|State Route 74 (Ohio 1923) State Route 74}} | SR 32 | Batavia | South of Seaman |
| 1261|126 Lima-Wapakoneta Road}} | 00608|State Route 6 (Ohio 1923) State Route 6}} | US 25 (former) | Lima | Wapakoneta |
| 1271|127 Lima-Delphos Road}} | 01001|State Route 10 (Ohio 1923) State Route 10}} | SR 309 | Lima | Delphos |
| 1281|128 Lima-Kenton Road}} | 01002|State Route 10 (Ohio 1923) State Route 10}} | SR 309 | Lima | Kenton |
| 1291|129 Lima-Ottawa Road}} | 03301|State Route 33 (Ohio 1923) State Route 33}} | SR 65 | Lima | Ottawa |
| 1301|130 Lima-Bellefontaine Road}} | 11703|State Route 117 (Ohio 1923) State Route 117}} | SR 117 | Lima | North of Huntsville |
| 1302|130 Lima-Bellefontaine Road}} | 03205|State Route 32 (Ohio 1923) State Route 32}} | US 33 | North of Huntsville | Bellefontaine |
| 1311|131 Delphos-St. Marys Road}} | 06602|State Route 66 (Ohio 1923) State Route 66}} | SR 66 | Delphos | St. Marys |
| 1321|132 Lima-Spencerville Road}} | 11702|State Route 117 (Ohio 1923) State Route 117}} | SR 117 | Lima | Conant |
| 1322|132 Lima-Spencerville Road}} | 11602|State Route 116 (Ohio 1923) State Route 116}} | SR 117 | Conant | Spencerville |
| 1331|133 Findlay-Delphos Road}} | 10603|State Route 106 (Ohio 1923) State Route 106}} | SR 12 | Findlay | Vaughnsville |
| 1332|133 Findlay-Delphos Road}} | 18901|State Route 189 (Ohio 1923) State Route 189}} | SR 12 (former) | Vaughnsville | Gomer |
| 1333|133 Findlay-Delphos Road}} | 00503|State Route 5 (Ohio 1923) State Route 5}} | US 30 | Gomer | Delphos |
| 1341|134 Kalida-Lima Road}} | 11501|State Route 115 (Ohio 1923) State Route 115}} | SR 115 | Kieferville | Lima |
| 1351|135 Van Wert-Spencerville Road}} | 11603|State Route 116 (Ohio 1923) State Route 116}} | SR 116, SR 117 | Van Wert | Spencerville |
| 1361|136 Delphos-Wapakoneta Road}} | 11701|State Route 117 (Ohio 1923) State Route 117}} | SR 198 (former) | Delphos (south of) | Conant |
| 1362|136 Delphos-Wapakoneta Road}} | 11601|State Route 116 (Ohio 1923) State Route 116}} | SR 198 | Conant | Wapakoneta |
| 1371|137 Delphos-Kalida Road}} | 10601|State Route 106 (Ohio 1923) State Route 106}} | SR 190 | Delphos | Fort Jennings |
| 1372|137 Delphos-Kalida Road}} | 19001|State Route 190 (Ohio 1923) State Route 190}} | SR 190 | Fort Jennings | West of Kalida |
| 1381|138 Bluffton-Carey Road}} | 10301|State Route 103 (Ohio 1923) State Route 103}} | SR 103 | Bluffton | Carey |
| 1391|139 Ashland-Medina Road}} | 05507|State Route 55 (Ohio 1923) State Route 55}} | US 42 | Ashland | Medina |
| 1401|140 Mansfield-Ashland Road}} | 00508|State Route 5 (Ohio 1923) State Route 5}} | US 42 | Mansfield | Ashland |
| 1411|141 Ashland-Wooster Road}} | 00509|State Route 5 (Ohio 1923) State Route 5}} | US 250 | Ashland | Wooster |
| 1421|142 Ashland-Norwalk Road}} | 06002|State Route 60 (Ohio 1923) State Route 60}} | SR 60/US 250 | Ashland | Savannah |
| 1422|142 Ashland-Norwalk Road}} | 18001|State Route 180 (Ohio 1923) State Route 180}} | US 250 | Savannah | Fitchville |
| 1423|142 Ashland-Norwalk Road}} | 03007|State Route 30 (Ohio 1923) State Route 30}} | SR 13/US 250 | Fitchville | Norwalk |
| 1431|143 Ashland-Loudonville Road}} | 06001|State Route 60 (Ohio 1923) State Route 60}} | SR 60 | Ashland | Loudonville |
| 1441|144 Ashland-Oberlin Road}} | 09602|State Route 96 (Ohio 1923) State Route 96}} | SR 58 | Ashland | South of Sullivan |
| 1442|144 Ashland-Oberlin Road}} | 05802|State Route 58 (Ohio 1923) State Route 58}} | SR 58 | South of Sullivan | Oberlin |
| 1451|145 Mansfield-Millersburg Road}} | 03902|State Route 39 (Ohio 1923) State Route 39}} | SR 39 | Mansfield | Millersburg |
| 1461|146 Mansfield-Wooster Road}} | 01006|State Route 10 (Ohio 1923) State Route 10}} | US 30, SR 430 | Mansfield | Wooster |
| 1471|147 Hayesville-Nashville Road}} | 17901|State Route 179 (Ohio 1923) State Route 179}} | SR 179 | Hayesville | Nashville |
| 1481|148 Ashland-Shelby Road}} | 09601|State Route 96 (Ohio 1923) State Route 96}} | SR 96 | Ashland | Shelby |
| 1491|149 Savannah-Vermilion Road}} | 06003|State Route 60 (Ohio 1923) State Route 60}} | SR 60 | Savannah | Vermilion |
| 1501|150 Niles-Ashtabula Road}} | 04602|State Route 46 (Ohio 1923) State Route 46}} | SR 46 | Niles | Ashtabula |
| 1511|151 Jefferson-Andover Road}} | 08402|State Route 84 (Ohio 1923) State Route 84}} | SR 307, Mells Road, Stanhope-Kelloggsville Road | Jefferson | West Andover |
| 1512|151 Jefferson-Andover Road}} | 08504|State Route 85 (Ohio 1923) State Route 85}} | SR 85, US 6 | West Andover | Pennsylvania |
| 1521|152 Jefferson-Geneva Road}} | 08401|State Route 84 (Ohio 1923) State Route 84}} | SR 307 | Jefferson | Geneva (south of) |
| 1531|153 Painesville-Warren Road}} | 08601|State Route 86 (Ohio 1923) State Route 86}} | SR 86 | Painesville | Windsor |
| 1532|153 Painesville-Warren Road}} | 04503|State Route 45 (Ohio 1923) State Route 45}} | SR 45 | Windsor | Warren |
| 1541|154 Windsor-Geneva Road}} | 04504|State Route 45 (Ohio 1923) State Route 45}} | SR 534 | Windsor | Geneva |
| 1551|155 Logan-Athens Road}} | 02106|State Route 21 (Ohio 1923) State Route 21}} | US 33 | Logan | Athens |
| 1561|156 Athens-Hockingport Road}} | 14401|State Route 144 (Ohio 1923) State Route 144}} | SR 144, US 50 | Athens | Hockingport |
| 1571|157 Athens-Marietta Road}} | 02607|State Route 26 (Ohio 1923) State Route 26}} | SR 550 | Athens | Marietta |
| 1581|158 New Lexington-Athens Road}} | 03001|State Route 30 (Ohio 1923) State Route 30}} | SR 13 | New Lexington | Chauncey |
| 1591|159 Athens-Pomeroy Road}} | 02107|State Route 21 (Ohio 1923) State Route 21}} | US 33 | Athens | Pomeroy |
| 1601|160 Athens-McArthur Road}} | 02606|State Route 26 (Ohio 1923) State Route 26}} | US 50 | Athens | McArthur |
| 1611|161 Pomeroy-Marietta Road}} | 00703|State Route 7 (Ohio 1923) State Route 7}} | SR 7 | Pomeroy | Little Hocking |
| 1621|162 McConnelsville-Athens Road}} | 07701|State Route 77 (Ohio 1923) State Route 77}} | SR 377 | McConnelsville | Sharpsburg |
| 1631|163 Middleport-McArthur Road}} | 14302|State Route 143 (Ohio 1923) State Route 143}} | SR 143 | Pomeroy | West of Albany |
| 1641|164 Sidney-Wapakoneta Road}} | 00607|State Route 6 (Ohio 1923) State Route 6}} | US 25 (former) | Sidney | Wapakoneta |
| 1651|165 Wapakoneta-St. Marys Road}} | 03203|State Route 32 (Ohio 1923) State Route 32}} | US 33 | Wapakoneta | St. Marys |
| 1661|166 Kenton-Wapakoneta Road}} | 06701|State Route 67 (Ohio 1923) State Route 67}} | SR 67 | Wapakoneta | Kenton |
| 1671|167 St. Marys-Celina Road}} | 03202|State Route 32 (Ohio 1923) State Route 32}} | SR 29, SR 703 | St. Marys | Celina |
| 1681|168 Bellefontaine-Wapakoneta Road}} | 03204|State Route 32 (Ohio 1923) State Route 32}} | US 33, SR 366 | North of Huntsville | Wapakoneta |
| 1691|169 Sidney-St. Marys Road}} | 05403|State Route 54 (Ohio 1923) State Route 54}} | SR 29 | Sidney | St. Marys |
| 1701|170 Piqua-St. Marys Road}} | 06601|State Route 66 (Ohio 1923) State Route 66}} | SR 66 | Piqua | St. Marys |
| 1711|171 Fort Recovery-Minster Road}} | 11901|State Route 119 (Ohio 1923) State Route 119}} | SR 119 | Indiana | Minster |
| 1721|172 Minster-Sidney Road}} | 11902|State Route 119 (Ohio 1923) State Route 119}} | SR 119 | Minster | Northwest of Sidney |
| 1731|173 St. Marys-Fort Wayne Road}} | 05404|State Route 54 (Ohio 1923) State Route 54}} | US 33 | St. Marys | Indiana |
| 1741|174 Celina-Kossuth Road}} | 19701|State Route 197 (Ohio 1923) State Route 197}} | SR 197 | Celina | Kossuth |
| 1751|175 Georgetown-Wilmington Road}} | 05302|State Route 53 (Ohio 1923) State Route 53}} | US 68 | Georgetown | Wilmington |
| 1761|176 Georgetown-Ripley Road}} | 22101|State Route 221 (Ohio 1923) State Route 221}} | US 68 | Georgetown | Ripley |
| 1771|177 Ripley-Hillsboro Road}} | 03801|State Route 38 (Ohio 1923) State Route 38}} | US 62 | Ripley | Hillsboro |
| 1781|178 Georgetown-Higginsport Road}} | 05301|State Route 53 (Ohio 1923) State Route 53}} | SR 221 | Georgetown | Higginsport |
| 1791|179 Hamilton-Middletown Road}} | 00602|State Route 6 (Ohio 1923) State Route 6}} | SR 4, SR 73 | Hamilton | Franklin |
| 1801|180 Hamilton-Eaton Road}} | 00902|State Route 9 (Ohio 1923) State Route 9}} | US 127 | Hamilton | Eaton |
| 1811|181 Hamilton-Richmond Road}} | 22401|State Route 224 (Ohio 1923) State Route 224}} | SR 177 | Hamilton | Indiana |
| 1821|182 Oxford-Millville Road}} | 12602|State Route 126 (Ohio 1923) State Route 126}} | US 27 | Indiana | McGonigle |
| 1822|182 Oxford-Millville Road}} | 22301|State Route 223 (Ohio 1923) State Route 223}} | US 27 | McGonigle | Northeast of Ross |
| 1831|183 Old Oxford Road}} | 12601|State Route 126 (Ohio 1923) State Route 126}} | SR 130 | Hamilton | McGonigle |
| 1841|184 Eaton-Middletown Road}} | 12202|State Route 122 (Ohio 1923) State Route 122}} | SR 122 | Eaton | Middletown |
| 1851|185 Hamilton-Lebanon Road}} | 12501|State Route 125 (Ohio 1923) State Route 125}} | SR 63 | Hamilton (east of) | Lebanon |
| 1861|186 Middletown-Germantown Road}} | 05201|State Route 52 (Ohio 1923) State Route 52}} | SR 4 | Middletown | Germantown |
| 1871|187 Springfield-Urbana Road}} | 05305|State Route 53 (Ohio 1923) State Route 53}} | US 68 | Springfield | Urbana |
| 1881|188 Urbana-West Jefferson Road}} | 02905|State Route 29 (Ohio 1923) State Route 29}} | SR 29 | Urbana | West Jefferson |
| 1891|189 Urbana-Bellefontaine Road}} | 05306|State Route 53 (Ohio 1923) State Route 53}} | US 68 | Urbana | Bellefontaine |
| 1901|190 Piqua-Urbana Road}} | 02904|State Route 29 (Ohio 1923) State Route 29}} | US 36 | Piqua | Urbana |
| 1911|191 Urbana-Marysville Road}} | 05502|State Route 55 (Ohio 1923) State Route 55}} | US 36 | Urbana | Marysville |
| 1921|192 Urbana-Sidney Road}} | 05402|State Route 54 (Ohio 1923) State Route 54}} | SR 29 | Urbana | Sidney |
| 1931|193 Troy-Urbana Northern Road}} | 20202|State Route 202 (Ohio 1923) State Route 202}} | Troy Urbana Road | Troy | Urbana |
| 1941|194 Urbana-London Road}} | 05601|State Route 56 (Ohio 1923) State Route 56}} | SR 56 | Urbana (east of) | London |
| 1951|195 Springfield-Xenia Road}} | 05304|State Route 53 (Ohio 1923) State Route 53}} | US 68 | Springfield | Xenia |
| 1961|196 Springfield-Troy Road}} | 07002|State Route 70 (Ohio 1923) State Route 70}} | SR 41 | Springfield | Troy |
| 1971|197 Springfield-Washington Court House Road}} | 07003|State Route 70 (Ohio 1923) State Route 70}} | SR 41 | Springfield | Washington Court House |
| 1981|198 Milton-Carlisle Road}} | 07102|State Route 71 (Ohio 1923) State Route 71}} | SR 571 | West Milton | Donnelsville |
| 1991|199 Bucyrus-Tiffin Road}} | 06202|State Route 62 (Ohio 1923) State Route 62}} | SR 19 | Bucyrus | Broken Sword |
| 1992|199 Bucyrus-Tiffin Road}} | 10001|State Route 100 (Ohio 1923) State Route 100}} | SR 100 | Broken Sword | Tiffin |
| 2001|200 Bucyrus-Upper Sandusky Road}} | 00505|State Route 5 (Ohio 1923) State Route 5}} | US 30 | Bucyrus | Upper Sandusky |
| 2011|201 Galion-Bucyrus Road}} | 06201|State Route 62 (Ohio 1923) State Route 62}} | SR 19 | Galion | Bucyrus |
| 2021|202 Mansfield-Galion Road}} | 01005|State Route 10 (Ohio 1923) State Route 10}} | SR 309 | Mansfield | Galion |
| 2031|203 Bucyrus-Crestline Road}} | 00506|State Route 5 (Ohio 1923) State Route 5}} | US 30 | Bucyrus | Crestline |
| 2041|204 Shelby-Galion Road}} | 06103|State Route 61 (Ohio 1923) State Route 61}} | SR 61 | Shelby | Galion |
| 2051|205 Plymouth-Bucyrus Road}} | 09802|State Route 98 (Ohio 1923) State Route 98}} | SR 98 | Plymouth | Bucyrus |
| 2061|206 Galion-Mount Gilead Road}} | 06102|State Route 61 (Ohio 1923) State Route 61}} | SR 61 | Galion | Mount Gilead |
| 2071|207 Crestline-Ontario Road}} | 18101|State Route 181 (Ohio 1923) State Route 181}} | SR 181 | Crestline | Ontario (west of) |
| 2081|208 Greenville-Covington Road}} | 02902|State Route 29 (Ohio 1923) State Route 29}} | US 36 | Greenville | Covington |
| 2091|209 Greenville-Milton Road}} | 07101|State Route 71 (Ohio 1923) State Route 71}} | SR 571 | Greenville | West Milton |
| 2101|210 Eaton-Greenville Road}} | 00903|State Route 9 (Ohio 1923) State Route 9}} | US 127 | Eaton | Greenville |
| 2111|211 Celina-Greenville Road}} | 00904|State Route 9 (Ohio 1923) State Route 9}} | US 127 | Celina | Greenville |
| 2121|212 Greenville-Union City Road}} | 02901|State Route 29 (Ohio 1923) State Route 29}} | SR 571 | Greenville | Union City |
| 2131|213 Greenville-Fort Recovery Road}} | 05102|State Route 51 (Ohio 1923) State Route 51}} | SR 49 | Greenville | Fort Recovery |
| 2141|214 Greenville-Versailles Road}} | 12102|State Route 121 (Ohio 1923) State Route 121}} | SR 121 | Greenville | Versailles |
| 2151|215 Greenville-New Paris Road}} | 12101|State Route 121 (Ohio 1923) State Route 121}} | SR 121 | Greenville | Indiana |
| 2161|216 Piqua-Versailles Road}} | 12001|State Route 120 (Ohio 1923) State Route 120}} | SR 185 | Piqua | Versailles |
| 2171|217 Sidney-Versailles Road}} | 06802|State Route 68 (Ohio 1923) State Route 68}} | SR 47 | Sidney | Versailles |
| 2181|218 Versailles-Brock Road}} | 12002|State Route 120 (Ohio 1923) State Route 120}} | SR 185 | Versailles | Brock |
| 2191|219 Findlay-Tiffin Road}} | 10604|State Route 106 (Ohio 1923) State Route 106}} | US 224 | Findlay | Tiffin |
| 2201|220 Findlay-Bowling Green Road}} | 00610|State Route 6 (Ohio 1923) State Route 6}} | SR 25 | Findlay | Bowling Green |
| 2211|221 Findlay-Kenton Road}} | 02101|State Route 21 (Ohio 1923) State Route 21}} | US 68 | Findlay | Kenton |
| 2221|222 Findlay-Upper Sandusky Road}} | 02205|State Route 22 (Ohio 1923) State Route 22}} | SR 199, SR 568 | Findlay | Upper Sandusky |
| 2231|223 Ottawa-Findlay Road}} | 02204|State Route 22 (Ohio 1923) State Route 22}} | SR 15 | Ottawa | Findlay |
| 2241|224 Baltimore-Fostoria Road}} | 01707|State Route 17 (Ohio 1923) State Route 17}} | SR 18 | Hoytville | Fostoria |
| 2251|225 Deshler-Findlay Road}} | 01706|State Route 17 (Ohio 1923) State Route 17}} | SR 18 | Deshler (west of) | Hoytville |
| 2252|225 Deshler-Findlay Road}} | 18601|State Route 186 (Ohio 1923) State Route 186}} | SR 186, SR 235 | Hoytville | Findlay (west of) |
| 2261|226 Bellefontaine-Kenton Road}} | 05307|State Route 53 (Ohio 1923) State Route 53}} | US 68 | Bellefontaine | Kenton |
| 2271|227 Kenton-Forest Road}} | 05308|State Route 53 (Ohio 1923) State Route 53}} | SR 53 | Kenton | Forest |
| 2281|228 Marysville-Kenton Road}} | 02102|State Route 21 (Ohio 1923) State Route 21}} | SR 31 | Marysville | Kenton |
| 2291|229 Kenton-Upper Sandusky Road}} | 06702|State Route 67 (Ohio 1923) State Route 67}} | SR 67 | Kenton | Upper Sandusky |
| 2301|230 Roundhead-Ada Road}} | 06904|State Route 69 (Ohio 1923) State Route 69}} | SR 235 | Roundhead | Ada |
| 2311|231 Ada-Forest Road}} | 06905|State Route 69 (Ohio 1923) State Route 69}} | SR 81 | Ada | Forest |
| 2321|232 Reservoir Road}} | 06903|State Route 69 (Ohio 1923) State Route 69}} | SR 235 | Roundhead | Lakeview |
| 2331|233 Forest-Upper Sandusky Road}} | 05309|State Route 53 (Ohio 1923) State Route 53}} | SR 53 | Forest | Upper Sandusky |
| 2341|234 Sidney-Bellefontaine Road}} | 06803|State Route 68 (Ohio 1923) State Route 68}} | SR 47 | Sidney | Bellefontaine |
| 2351|235 Marysville-Bellefontaine Road}} | 03206|State Route 32 (Ohio 1923) State Route 32}} | US 33 | Marysville | Bellefontaine |
| 2361|236 Bellefontaine-Richwood Road}} | 06804|State Route 68 (Ohio 1923) State Route 68}} | SR 47 | Bellefontaine | East of Richwood |
| 2371|237 Piqua-Sidney Road}} | 00606|State Route 6 (Ohio 1923) State Route 6}} | US 25 (former) | Piqua | Sidney |
| 2381|238 Delaware-Marysville Road}} | 05503|State Route 55 (Ohio 1923) State Route 55}} | US 36 | Delaware | Marysville |
| 2391|239 Marysville-London Road}} | 03805|State Route 38 (Ohio 1923) State Route 38}} | SR 38 | Marysville | London |
| 2401|240 Richwood-Delaware Road}} | 04702|State Route 47 (Ohio 1923) State Route 47}} | SR 37 | South of Richwood | Delaware |
| 2411|241 Delaware-London Road}} | 16001|State Route 160 (Ohio 1923) State Route 160}} | US 42 | Delaware | London |
| 2421|242 Plain City-Dublin Road}} | 16101|State Route 161 (Ohio 1923) State Route 161}} | SR 161 | Plain City | Dublin (west of) |
| 2431|243 London-Circleville Road}} | 05602|State Route 56 (Ohio 1923) State Route 56}} | SR 56 | London | Circleville |
| 2441|244 Washington-London Road}} | 03807|State Route 38 (Ohio 1923) State Route 38}} | SR 38 | Bloomingburg (south of) | Bloomingburg |
| 2442|244 Washington-London Road}} | 03804|State Route 38 (Ohio 1923) State Route 38}} | SR 38 | Bloomingburg | London |
| 2451|245 Piqua-Troy Road}} | 00605|State Route 6 (Ohio 1923) State Route 6}} | US 25 (former) | Piqua | Troy |
| 2461|246 Piqua-Covington Road}} | 02903|State Route 29 (Ohio 1923) State Route 29}} | US 36 | Piqua | Covington |
| 2471|247 Covington-Troy Road}} | 07001|State Route 70 (Ohio 1923) State Route 70}} | SR 41 | Covington | Troy |
| 2481|248 Wilmington-Xenia Road}} | 05303|State Route 53 (Ohio 1923) State Route 53}} | US 68 | Wilmington | Xenia |
| 2491|249 Eaton-Richmond Road}} | 01101|State Route 11 (Ohio 1923) State Route 11}} | US 35 | Eaton | Indiana |
| 2501|250 Franklin-Lebanon Road}} | 12301|State Route 123 (Ohio 1923) State Route 123}} | SR 123 | Franklin | Lebanon |
| 2511|251 Franklin-Wilmington Road}} | 07301|State Route 73 (Ohio 1923) State Route 73}} | SR 73 | Franklin | Wilmington |
| 2521|252 Lebanon-Morrow Road}} | 12302|State Route 123 (Ohio 1923) State Route 123}} | SR 123 | Lebanon | Morrow |
| 2531|253 Roachester-Blanchester Road}} | 12303|State Route 123 (Ohio 1923) State Route 123}} | SR 123 | Roachester | Blanchester |
| 2541|254 Wilmington-Hillsboro Road}} | 07302|State Route 73 (Ohio 1923) State Route 73}} | SR 73 | Wilmington | Hillsboro |
| 2551|255 Batavia-Owensville Road}} | 13202|State Route 132 (Ohio 1923) State Route 132}} | SR 132 | Batavia | Owensville |
| 2561|256 Batavia-New Richmond Road}} | 13201|State Route 132 (Ohio 1923) State Route 132}} | SR 132 | Batavia | New Richmond |
| 2571|257 Bethel-Chilo Road}} | 13301|State Route 133 (Ohio 1923) State Route 133}} | SR 133, SR 222 | Bethel | Chilo |
| 2581|258 Hillsboro-Chillicothe Road}} | 02604|State Route 26 (Ohio 1923) State Route 26}} | US 50 | Hillsboro | Chillicothe |
| 2591|259 Hillsboro-Washington Road}} | 03802|State Route 38 (Ohio 1923) State Route 38}} | US 62 | Hillsboro | Washington Court House |
| 2601|260 Hillsboro-Greenfield Road}} | 13801|State Route 138 (Ohio 1923) State Route 138}} | SR 138 | Hillsboro | Greenfield |
| 2611|261 Hillsboro-Piketon Road}} | 02401|State Route 24 (Ohio 1923) State Route 24}} | SR 124 | Hillsboro | Piketon |
| 2621|262 Celina-Van Wert Road}} | 00905|State Route 9 (Ohio 1923) State Route 9}} | US 127 | Celina | Van Wert |
| 2631|263 Fort Recovery-Willshire Road}} | 05103|State Route 51 (Ohio 1923) State Route 51}} | SR 49 | Fort Recovery | Willshire |
| 2641|264 Celina-Wabash Road}} | 03201|State Route 32 (Ohio 1923) State Route 32}} | SR 29 | Celina | Indiana |
| 2651|265 Van Wert-Rockford Road}} | 11801|State Route 118 (Ohio 1923) State Route 118}} | SR 118 | Van Wert | Rockford |
| 2661|266 Upper Sandusky-Tiffin Road}} | 05310|State Route 53 (Ohio 1923) State Route 53}} | SR 53 | Upper Sandusky | Tiffin |
| 2671|267 Upper Sandusky-Bellevue Road}} | 06703|State Route 67 (Ohio 1923) State Route 67}} | SR 67, SR 18, SR 113 | Upper Sandusky | Northeast of Bellevue |
| 2681|268 Fostoria-Carey Road}} | 06301|State Route 63 (Ohio 1923) State Route 63}} | US 23 | Fostoria | Carey |
| 2691|269 Fremont-Tiffin Road}} | 05311|State Route 53 (Ohio 1923) State Route 53}} | SR 53 | Fremont | Tiffin |
| 2701|270 Tiffin-Fostoria Road}} | 01708|State Route 17 (Ohio 1923) State Route 17}} | SR 18 | Tiffin | Fostoria |
| 2711|271 Tiffin-Bellevue Road}} | 10101|State Route 101 (Ohio 1923) State Route 101}} | SR 101 | Tiffin | South of Clyde |
| 2711|271 Tiffin-Bellevue Road}} | 22901|State Route 229 (Ohio 1923) State Route 229}} | SR 113 (former) | South of Clyde | Bellevue |
| 2721|272 Tiffin-New Haven Road}} | 01709|State Route 17 (Ohio 1923) State Route 17}} | US 224 | Tiffin | Chicago Junction |
| 2731|273 Perrysburg-Fostoria Road}} | 06302|State Route 63 (Ohio 1923) State Route 63}} | SR 199 | Perrysburg | Fostoria |
| 2741|274 Fremont-Bellevue Road}} | 00206|State Route 2 (Ohio 1923) State Route 2}} | US 20 | Fremont | Bellevue |
| 2751|275 Fremont-Perrysburg Road}} | 00205|State Route 2 (Ohio 1923) State Route 2}} | US 20 | Fremont | Southeast of Woodville |
| 2752|275 Fremont-Perrysburg Road}} | 10202|State Route 102 (Ohio 1923) State Route 102}} | US 20 | Southeast of Woodville | Perrysburg |
| 2761|276 Sandusky-Clyde Road}} | 10102|State Route 101 (Ohio 1923) State Route 101}} | SR 101 | Sandusky | Clyde (south of) |
| 2771|277 Fremont-Port Clinton Road}} | 05312|State Route 53 (Ohio 1923) State Route 53}} | SR 53 | Fremont | Port Clinton |
| 2781|278 Fremont-Bowling Green Road}} | 03404|State Route 34 (Ohio 1923) State Route 34}} | US 6 | Fremont | Bowling Green |
| 2791|279 Bowling Green-Port Clinton Road}} | 10501|State Route 105 (Ohio 1923) State Route 105}} | SR 105 | Bowling Green | Oak Harbor |
| 2792|279 Bowling Green-Port Clinton Road}} | 16302|State Route 163 (Ohio 1923) State Route 163}} | SR 163 | Oak Harbor | Port Clinton |
| 2801|280 Fremont-Oak Harbor Road}} | 06205|State Route 62 (Ohio 1923) State Route 62}} | SR 19 | Fremont | Oak Harbor |
| 2811|281 Fremont-Castalia Road}} | 03405|State Route 34 (Ohio 1923) State Route 34}} | SR 412 | Fremont | Castalia |
| 2821|282 Bowling Green-Perrysburg Road}} | 00611|State Route 6 (Ohio 1923) State Route 6}} | SR 25 | Bowling Green | Perrysburg |
| 2831|283 Bowling Green-Waterville Road}} | 06401|State Route 64 (Ohio 1923) State Route 64}} | SR 64 | Bowling Green | Waterville |
| 2841|284 Grand Rapids-Bowling Green Road}} | 18402|State Route 184 (Ohio 1923) State Route 184}} | SR 110 (former) | Grand Rapids | Bowling Green (north of) |
| 2851|285 Ottawa-Grand Rapids Road}} | 06501|State Route 65 (Ohio 1923) State Route 65}} | SR 65 | Ottawa | McClure |
| 2852|285 Ottawa-Grand Rapids Road}} | 18501|State Route 185 (Ohio 1923) State Route 185}} | SR 65 | McClure | North of McClure |
| 2853|285 Ottawa-Grand Rapids Road}} | 11002|State Route 110 (Ohio 1923) State Route 110}} | SR 110 | North of McClure | Grand Rapids |
| 2854|285 Ottawa-Grand Rapids Road}} | 18401|State Route 184 (Ohio 1923) State Route 184}} | SR 295 | Grand Rapids | Grand Rapids (north of) |
| 2861|286 Bowling Green-Napoleon Road}} | 03403|State Route 34 (Ohio 1923) State Route 34}} | US 6 | Bowling Green | Napoleon |
| 2871|287 Mansfield-Norwalk Road}} | 03006|State Route 30 (Ohio 1923) State Route 30}} | SR 13 | Mansfield | Fitchville |
| 2881|288 Milan-Elyria Road}} | 06106|State Route 61 (Ohio 1923) State Route 61}} | SR 113 | Milan | Berlinville |
| 2882|288 Milan-Elyria Road}} | 05902|State Route 59 (Ohio 1923) State Route 59}} | SR 113 | Berlinville | Elyria |
| 2891|289 Bellevue-Norwalk Road}} | 00207|State Route 2 (Ohio 1923) State Route 2}} | US 20 | Bellevue | Norwalk |
| 2901|290 Oberlin-Norwalk Road}} | 00208|State Route 2 (Ohio 1923) State Route 2}} | US 20, SR 511 | Oberlin | Norwalk |
| 2911|291 Medina-Norwalk Road}} | 01801|State Route 18 (Ohio 1923) State Route 18}} | SR 18 | Medina | Norwalk |
| 2921|292 Plymouth-Norwalk Road}} | 06105|State Route 61 (Ohio 1923) State Route 61}} | SR 61 | Plymouth | Norwalk |
| 2931|293 New London-Fitchville Road}} | 16201|State Route 162 (Ohio 1923) State Route 162}} | SR 162 | New London | Fitchville |
| 2941|294 Sandusky-Norwalk Road}} | 03008|State Route 30 (Ohio 1923) State Route 30}} | US 250 | Sandusky | Norwalk |
| 2951|295 Barnesville-Bellaire Road}} | 14702|State Route 147 (Ohio 1923) State Route 147}} | SR 147 | Barnesville | Bellaire |
| 2961|296 Wauseon-Napoleon Road}} | 03303|State Route 33 (Ohio 1923) State Route 33}} | SR 108 | Wauseon | Napoleon |
| 2971|297 Bryan-Wauseon Road}} | 00202|State Route 2 (Ohio 1923) State Route 2}} | SR 2 | Bryan | Wauseon |
| 2981|298 Wauseon-Morenci Road}} | 03304|State Route 33 (Ohio 1923) State Route 33}} | SR 108 | Wauseon | Michigan |
| 2991|299 Liberty-Adrian Road}} | 06502|State Route 65 (Ohio 1923) State Route 65}} | SR 109 | McClure (west of) | Michigan |
| 3001|300 Swanton-Metamora Road}} | 06403|State Route 64 (Ohio 1923) State Route 64}} | SR 64 | Swanton | Michigan |
| 3011|301 Archbold-Fayette Road}} | 06605|State Route 66 (Ohio 1923) State Route 66}} | SR 66, US 127 | Archbold | Michigan |
| 3021|302 Archbold-Defiance Road}} | 06604|State Route 66 (Ohio 1923) State Route 66}} | SR 66 | Archbold | Defiance |
| 3031|303 West Unity-Montpelier Road}} | 10701|State Route 107 (Ohio 1923) State Route 107}} | SR 107, US 20A | Burlington | Montpelier (west of) |
| 3041|304 Bryan-Fort Wayne Road}} | 10802|State Route 108 (Ohio 1923) State Route 108}} | SR 2 | Bryan | Hicksville |
| 3042|304 Bryan-Fort Wayne Road}} | 01701|State Route 17 (Ohio 1923) State Route 17}} | SR 2 | Hicksville | Indiana |
| 3051|305 Bryan-Defiance Road}} | 00908|State Route 9 (Ohio 1923) State Route 9}} | SR 15 | Bryan | Ney |
| 3052|305 Bryan-Defiance Road}} | 02202|State Route 22 (Ohio 1923) State Route 22}} | SR 15 | Ney | Defiance |
| 3061|306 Bryan-Pioneer Road}} | 00909|State Route 9 (Ohio 1923) State Route 9}} | SR 15 | Bryan | Michigan |
| 3071|307 Bryan-West Unity Road}} | 10803|State Route 108 (Ohio 1923) State Route 108}} | US 127 | Bryan | Alvordton (east of) |
| 3081|308 Bryan-Edon Road}} | 03401|State Route 34 (Ohio 1923) State Route 34}} | SR 34 | Bryan | Indiana |
| 3091|309 Bryan-Edgerton Road}} | 00201|State Route 2 (Ohio 1923) State Route 2}} | US 6 | Bryan | Indiana |
| 3101|310 Bryan-Napoleon Road}} | 03402|State Route 34 (Ohio 1923) State Route 34}} | SR 34, US 6 | Bryan | Napoleon |
| 3111|311 Edon-Cooney Road}} | 10702|State Route 107 (Ohio 1923) State Route 107}} | SR 49 | Edon | Michigan |
| 3121|312 Stryker-Evansport Road}} | 19101|State Route 191 (Ohio 1923) State Route 191}} | SR 191 | Stryker | Evansport (east of) |
| 3131|313 Oberlin-Elyria Road}} | 00209|State Route 2 (Ohio 1923) State Route 2}} | US 20, SR 511 | Oberlin | Elyria |
| 3141|314 Medina-Elyria Road}} | 05702|State Route 57 (Ohio 1923) State Route 57}} | SR 57 | Medina | Elyria |
| 3151|315 Elyria-Lorain Road}} | 05703|State Route 57 (Ohio 1923) State Route 57}} | SR 57 | Elyria | Lorain |
| 3161|316 Napoleon-Defiance Road}} | 03102|State Route 31 (Ohio 1923) State Route 31}} | US 24 | Napoleon | Defiance |
| 3171|317 Ottawa-Napoleon Road}} | 03302|State Route 33 (Ohio 1923) State Route 33}} | SR 109, SR 108, CR 10A | Ottawa | Napoleon |
| 3181|318 Defiance-Holgate Road}} | 01703|State Route 17 (Ohio 1923) State Route 17}} | SR 18 | Defiance | East of Holgate |
| 3191|319 Napoleon-Deshler Road}} | 01705|State Route 17 (Ohio 1923) State Route 17}} | SR 18 | East of Holgate | Deshler (west of) |
| 3201|320 Holgate-Kieferville Road}} | 11502|State Route 115 (Ohio 1923) State Route 115}} | SR 115 (former), SR 108 | North of Holgate | Kieferville |
| 3211|321 Medina-Wadsworth Road}} | 05701|State Route 57 (Ohio 1923) State Route 57}} | SR 57 | Medina | Wadsworth |
| 3221|322 Ravenna-Warren Road}} | 03605|State Route 36 (Ohio 1923) State Route 36}} | SR 5 | Ravenna | Warren |
| 3231|323 Kent-Ravenna Road}} | 03604|State Route 36 (Ohio 1923) State Route 36}} | SR 59 | Kent | Ravenna |
| 3241|324 Painesville-Ravenna Road}} | 04403|State Route 44 (Ohio 1923) State Route 44}} | SR 44 | Painesville | Ravenna |
| 3251|325 Warren-Burton Road}} | 01602|State Route 16 (Ohio 1923) State Route 16}} | US 422 | Warren | Parkman |
| 3252|325 Warren-Burton Road}} | 08702|State Route 87 (Ohio 1923) State Route 87}} | SR 168 | Parkman | Burton |
| 3261|326 Ravenna-Parkman Road}} | 08801|State Route 88 (Ohio 1923) State Route 88}} | SR 88 | Ravenna | Parkman |
| 3271|327 Chardon-Madison Road}} | 08502|State Route 85 (Ohio 1923) State Route 85}} | US 6 | Chardon | Hambden |
| 3272|327 Chardon-Madison Road}} | 16601|State Route 166 (Ohio 1923) State Route 166}} | SR 166, SR 528 | Hambden | Madison |
| 3281|328 Canfield-Niles Road}} | 04601|State Route 46 (Ohio 1923) State Route 46}} | SR 46 | Canfield | Niles |
| 3291|329 Warren-Sharon Road}} | 08203|State Route 82 (Ohio 1923) State Route 82}} | SR 82 | Warren | Sharon, PA |
| 3301|330 Warren-Meadville Road}} | 03606|State Route 36 (Ohio 1923) State Route 36}} | SR 5 | Warren | Pennsylvania |
| 3311|331 Youngstown-Sharon Road}} | 01910|State Route 19 (Ohio 1923) State Route 19}} | US 62 | Youngstown | Sharon, PA |
| 3321|332 Delaware-Mount Gilead Road}} | 05504|State Route 55 (Ohio 1923) State Route 55}} | US 42 | Delaware | Mount Gilead |
| 3331|333 Mount Gilead-Mount Vernon Road}} | 04202|State Route 42 (Ohio 1923) State Route 42}} | SR 95, SR 13 | Mount Gilead | Mount Vernon |
| 3341|334 Mount Gilead-Mansfield Road}} | 05505|State Route 55 (Ohio 1923) State Route 55}} | US 42 | Mount Gilead | Mansfield |
| 3351|335 Mount Gilead-Sunbury Road}} | 06101|State Route 61 (Ohio 1923) State Route 61}} | SR 61 | Mount Gilead | Sunbury |
| 3361|336 Delaware-Newark Road}} | 04701|State Route 47 (Ohio 1923) State Route 47}} | SR 37 | Delaware | Newark (west of) |
| 3371|337 Newark-Mount Vernon Road}} | 03003|State Route 30 (Ohio 1923) State Route 30}} | SR 13 | Newark | Mount Vernon |
| 3381|338 Mount Vernon-Mansfield Road}} | 03005|State Route 30 (Ohio 1923) State Route 30}} | SR 13 | Mount Vernon (north of) | Mansfield |
| 3391|339 Mount Vernon-Coshocton Road}} | 04203|State Route 42 (Ohio 1923) State Route 42}} | US 36, SR 715 | Mount Vernon | Coshocton |
| 3401|340 Danville-Jelloway Road}} | 20501|State Route 205 (Ohio 1923) State Route 205}} | SR 205 | Danville | Jelloway |
| 3411|341 Millersburg-Canal Dover Road}} | 03903|State Route 39 (Ohio 1923) State Route 39}} | SR 39 | Millersburg | Canal Dover |
| 3421|342 Millersburg-Wooster Road}} | 07604|State Route 76 (Ohio 1923) State Route 76}} | SR 83 | Millersburg | Wooster |
| 3431|343 Killbuck Road}} | 07603|State Route 76 (Ohio 1923) State Route 76}} | SR 60 | Coshocton (west of) | Killbuck |
| 3441|344 Zanesville-Dresden Road}} | 07703|State Route 77 (Ohio 1923) State Route 77}} | SR 60 | Zanesville | Trinway |
| 3451|345 Zanesville-McConnelsville Road}} | 07702|State Route 77 (Ohio 1923) State Route 77}} | SR 60, SR 376 | Zanesville | McConnelsville |
| 3461|346 Newark-Zanesville Road}} | 15601|State Route 156 (Ohio 1923) State Route 156}} | SR 146 | Newark (east of) | Zanesville (north of) |
| 3471|347 Newark-Coshocton Road}} | 02002|State Route 20 (Ohio 1923) State Route 20}} | SR 16 | Newark | Coshocton |
| 3481|348 Zanesville-Caldwell Road}} | 14601|State Route 146 (Ohio 1923) State Route 146}} | SR 146, SR 215 (former) | Zanesville | Caldwell (north of) |
| 3491|349 Cambridge-Coshocton Road}} | 20901|State Route 209 (Ohio 1923) State Route 209}} | SR 209 | Cambridge | Bloomfield |
| 3491|349 Cambridge-Coshocton Road}} | 07602|State Route 76 (Ohio 1923) State Route 76}} | SR 83 | Bloomfield | Coshocton |
| 3501|350 Zanesville-New Lexington Road}} | 07505|State Route 75 (Ohio 1923) State Route 75}} | SR 93 | Zanesville (south of) | New Lexington (east of) |
| 3511|351 Zanesville-Otsego Road}} | 07506|State Route 75 (Ohio 1923) State Route 75}} | SR 93 | Zanesville | Otsego |
| 3521|352 Cambridge-Newcomerstown Road}} | 00803|State Route 8 (Ohio 1923) State Route 8}} | US 21 (former) | Cambridge | Newcomerstown |
| 3531|353 Cambridge-Caldwell Road}} | 00802|State Route 8 (Ohio 1923) State Route 8}} | SR 821 | Cambridge | Caldwell |
| 3541|354 McConnelsville-New Lexington Road}} | 03702|State Route 37 (Ohio 1923) State Route 37}} | SR 37 | McConnelsville | New Lexington |
| 3551|355 Logan-New Lexington Road}} | 07504|State Route 75 (Ohio 1923) State Route 75}} | SR 93 | Logan | New Lexington |
| 3561|356 Newark-New Lexington Road}} | 03002|State Route 30 (Ohio 1923) State Route 30}} | SR 13 | Newark | New Lexington |
| 3571|357 Lancaster-New Lexington Road}} | 03701|State Route 37 (Ohio 1923) State Route 37}} | SR 37 | Lancaster | New Lexington |
| 3581|358 Shawnee-Corning Road}} | 21602|State Route 216 (Ohio 1923) State Route 216}} | SR 155 | Shawnee | Corning |
| 3591|359 Lancaster-Newark Road}} | 07901|State Route 79 (Ohio 1923) State Route 79}} | SR 79, SR 37 | Lancaster | Newark |
| 3601|360 Logan-Lancaster Road}} | 02105|State Route 21 (Ohio 1923) State Route 21}} | US 33 | Logan | Lancaster |
| 3611|361 Chillicothe-Lancaster Road}} | 15901|State Route 159 (Ohio 1923) State Route 159}} | SR 159 | Chillicothe (north of) | Lancaster (south of) |
| 3621|362 Circleville-Adelphi Road}} | 05603|State Route 56 (Ohio 1923) State Route 56}} | SR 56 | Circleville | Adelphi |
| 3631|363 Chillicothe-Logan Road}} | 02702|State Route 27 (Ohio 1923) State Route 27}} | SR 180 | Chillicothe (north of) | Logan (west of) |
| 3641|364 Chillicothe-Jackson Road}} | 01104|State Route 11 (Ohio 1923) State Route 11}} | US 35 | Chillicothe | Jackson |
| 3651|365 Chillicothe-McArthur Road}} | 02605|State Route 26 (Ohio 1923) State Route 26}} | US 50 | Chillicothe | McArthur |
| 3661|366 Jackson-Piketon Road}} | 02402|State Route 24 (Ohio 1923) State Route 24}} | SR 124 | Jackson | Piketon |
| 3671|367 Waverly-Zahn's Corner Road}} | 22001|State Route 220 (Ohio 1923) State Route 220}} | SR 220 | Waverly | Zahn's Corner |
| 3681|368 Lisbon-Canton Southern Road}} | 00515|State Route 5 (Ohio 1923) State Route 5}} | US 30 | Lisbon | Minerva (east of) |
| 3682|368 Lisbon-Canton Southern Road}} | 22601|State Route 226 (Ohio 1923) State Route 226}} | unbuilt | Minerva (east of) | Minerva (north of) |
| 3691|369 Minerva-Sandyville Road}} | 00514|State Route 5 (Ohio 1923) State Route 5}} | US 30 | Minerva (east of) | Minerva |
| 3692|369 Minerva-Sandyville Road}} | 15501|State Route 155 (Ohio 1923) State Route 155}} | SR 183 | Minerva | Sandyville |
| 3701|370 Dennison-Cadiz Road}} | 01302|State Route 13 (Ohio 1923) State Route 13}} | US 250 | Dennison | Cadiz |
| 3711|371 Cadiz-Carrollton Road}} | 03505|State Route 35 (Ohio 1923) State Route 35}} | SR 9 | Cadiz | Carrollton |
| 3721|372 Dennison-Scio Road}} | 21201|State Route 212 (Ohio 1923) State Route 212}} | SR 151 | Dennison (east of) | Bowerston |
| 3722|372 Dennison-Scio Road}} | 15102|State Route 151 (Ohio 1923) State Route 151}} | SR 151 | Bowerston | Jewett (west of) |
| 3723|372 Dennison-Scio Road}} | 22701|State Route 227 (Ohio 1923) State Route 227}} | New Rumley Road | Jewett (west of) | Jewett (southwest of) |
| 3731|373 Jewett-Hopedale Road}} | 15103|State Route 151 (Ohio 1923) State Route 151}} | Old Jewett Road | Jewett (west of) | Jewett |
| 3732|373 Jewett-Hopedale Road}} | 15104|State Route 151 (Ohio 1923) State Route 151}} | SR 151 | Jewett | Hopedale |
| 3741|374 Dell Roy-Bowerston Road}} | 15101|State Route 151 (Ohio 1923) State Route 151}} | SR 212 | Dellroy | Bowerston |
| 3751|375 Carrollton-Kensington Road}} | 03506|State Route 35 (Ohio 1923) State Route 35}} | SR 9 | Carrollton | Kensington |
| 3761|376 Carrollton-Canal Dover Road}} | 02007|State Route 20 (Ohio 1923) State Route 20}} | SR 39 | Carrollton | Canal Dover |
| 3771|377 Carrollton-Salineville Road}} | 02008|State Route 20 (Ohio 1923) State Route 20}} | SR 39 | Carrollton | Salineville |
| 3781|378 Skelley-Empire Road}} | 15201|State Route 152 (Ohio 1923) State Route 152}} | SR 152 | Skelley | Empire |
| 3791|379 Mingo-Smithfield Road}} | 15105|State Route 151 (Ohio 1923) State Route 151}} | SR 151 | Mingo Junction | Hopedale |
| 3801|380 Mount Pleasant-Rayland Road}} | 15001|State Route 150 (Ohio 1923) State Route 150}} | SR 150 | Mount Pleasant (west of) | Rayland |
| 3811|381 Salineville-Yellow Creek Road}} | 02009|State Route 20 (Ohio 1923) State Route 20}} | SR 39 | Salineville | Wellsville |
| 3821|382 Lisbon-Salineville Road}} | 16401|State Route 164 (Ohio 1923) State Route 164}} | SR 164 | Lisbon | Salineville |
| 3831|383 Lisbon-East Palestine Road}} | 15401|State Route 154 (Ohio 1923) State Route 154}} | SR 517, SR 558 | Lisbon | East Palestine |
| 3832|383 Lisbon-East Palestine Road}} | 01404|State Route 14 (Ohio 1923) State Route 14}} | SR 165 | East Palestine | Pennsylvania |
| 3841|384 Salem-Hanoverton Road}} | 03508|State Route 35 (Ohio 1923) State Route 35}} | SR 9 | Salem | Hanoverton |
| 3851|385 Woodsfield-Clarington Road}} | 07804|State Route 78 (Ohio 1923) State Route 78}} | SR 78 | Woodsfield | Clarington |
| 3861|386 Caldwell-Woodsfield Road}} | 07803|State Route 78 (Ohio 1923) State Route 78}} | SR 78, SR 145, SR 724 | Caldwell | Woodsfield |
| 3871|387 Woodsfield-Sistersville Road}} | 04801|State Route 48 (Ohio 1923) State Route 48}} | SR 800 | Woodsfield | Fly |
| 3881|388 Lower Salem-Jerles Road}} | 14501|State Route 145 (Ohio 1923) State Route 145}} | SR 145 | Lower Salem | Jerles |
| 3891|389 Woodsfield-Marietta Road}} | 02608|State Route 26 (Ohio 1923) State Route 26}} | SR 26 | Woodsfield | Marietta |
| 3901|390 Caldwell-McConnelsville Road}} | 07802|State Route 78 (Ohio 1923) State Route 78}} | SR 78 | Caldwell | McConnelsville |
| 3911|391 Caldwell-Marietta Road}} | 00801|State Route 8 (Ohio 1923) State Route 8}} | SR 821 | Caldwell | Marietta |
| 3921|392 Caldwell-Barnesville Road}} | 14701|State Route 147 (Ohio 1923) State Route 147}} | SR 147 | Caldwell (east of) | Barnesville (west of) |
| 3931|393 Marietta-McConnelsville Road}} | 03703|State Route 37 (Ohio 1923) State Route 37}} | SR 60 | Marietta | McConnelsville |
| 3941|394 Pomeroy-Portland Road}} | 02404|State Route 24 (Ohio 1923) State Route 24}} | SR 124, US 33 | Pomeroy | West Virginia |
| 3951|395 Pomeroy-Jackson Road}} | 02403|State Route 24 (Ohio 1923) State Route 24}} | SR 124 | Pomeroy | Jackson |
| 3961|396 McArthur-Jackson Road}} | 07502|State Route 75 (Ohio 1923) State Route 75}} | SR 93 | McArthur | Jackson |
| 3971|397 McArthur-Logan Road}} | 07503|State Route 75 (Ohio 1923) State Route 75}} | SR 93 | McArthur | Logan |
| 3981|398 Gallipolis-McArthur Road}} | 14201|State Route 142 (Ohio 1923) State Route 142}} | SR 160 | Gallipolis | McArthur (south of) |
| 3991|399 Jackson-Gallipolis Road}} | 01105|State Route 11 (Ohio 1923) State Route 11}} | US 35 | Jackson | Gallipolis |
| 4001|400 Jackson-Ironton Road}} | 07501|State Route 75 (Ohio 1923) State Route 75}} | SR 93 | Jackson | Ironton |
| 4011|401 Oak Hill-Cadmus Road}} | 14103|State Route 141 (Ohio 1923) State Route 141}} | SR 233 | Oak Hill | Cadmus |
| 4021|402 Oak Hill-Portsmouth Road}} | 14001|State Route 140 (Ohio 1923) State Route 140}} | SR 140 | Oak Hill | Portsmouth (east of) |
| 4031|403 Jackson-Portsmouth Road}} | 13901|State Route 139 (Ohio 1923) State Route 139}} | SR 139 | Jackson | Portsmouth |
| 4041|404 Ironton-Miller Road}} | 14102|State Route 141 (Ohio 1923) State Route 141}} | SR 141 | Ironton | Ironton (east of) |
| 4042|404 Ironton-Miller Road}} | 21701|State Route 217 (Ohio 1923) State Route 217}} | SR 217 | Ironton (east of) | Miller |
| 4051|405 Gallipolis-Ironton Road}} | 14101|State Route 141 (Ohio 1923) State Route 141}} | SR 141 | Gallipolis | Ironton (east of) |
| 4061|406 Portsmouth-Lucasville Western Road}} | 07304|State Route 73 (Ohio 1923) State Route 73}} | SR 73 | Portsmouth | Portsmouth (north of) |
| 4062|406 Portsmouth-Lucasville Western Road}} | 10401|State Route 104 (Ohio 1923) State Route 104}} | SR 104 | Portsmouth (north of) | Lucasville (west of) |
| 4063|406 Portsmouth-Lucasville Western Road}} | 10404|State Route 104 (Ohio 1923) State Route 104}} | SR 348 | Lucasville (west of) | Lucasville |
| 4071|407 Newcomerstown-Coshocton Road}} | 02003|State Route 20 (Ohio 1923) State Route 20}} | US 36 | Newcomerstown | Coshocton |
| 4081|408 West Lafayette-New Philadelphia Road}} | 07508|State Route 75 (Ohio 1923) State Route 75}} | SR 751 | West Lafayette | Stone Creek |
| 4082|408 West Lafayette-New Philadelphia Road}} | 02005|State Route 20 (Ohio 1923) State Route 20}} | US 21 (former) | Stone Creek | New Philadelphia (west of) |
| 4091|409 Canal Dover-New Philadelphia Western Road}} | 21101|State Route 211 (Ohio 1923) State Route 211}} | SR 211 (former) | Canal Dover | New Philadelphia (west of) |
| 4092|409 Canal Dover-New Philadelphia Western Road}} | 02006|State Route 20 (Ohio 1923) State Route 20}} | US 21 (former) | New Philadelphia (west of) | New Philadelphia |
| 4101|410 Marquand Mills-Newcomerstown Road}} | 07507|State Route 75 (Ohio 1923) State Route 75}} | SR 93, CR 106 | Marquand Mills | Newcomerstown (west of) |
| 4111|411 Walhonding-Newark Road}} | 07903|State Route 79 (Ohio 1923) State Route 79}} | SR 79 | Walhonding | Fallsburg (east of) |
| 4112|411 Walhonding-Newark Road}} | 20701|State Route 207 (Ohio 1923) State Route 207}} | SR 668 (former) | Fallsburg (east of) | Newark (east of) |
| 4121|412 New Philadelphia-Uhrichsville Road}} | 00805|State Route 8 (Ohio 1923) State Route 8}} | US 250 | New Philadelphia | Uhrichsville |
| 4131|413 Newcomerstown-Uhrichsville Road}} | 00804|State Route 8 (Ohio 1923) State Route 8}} | US 36 | Newcomerstown | Uhrichsville |
| 4141|414 Wooster-Canal Dover Road}} | 09501|State Route 95 (Ohio 1923) State Route 95}} | US 250 | Wooster | Strasburg (north of) |
| 4142|414 Wooster-Canal Dover Road}} | 01305|State Route 13 (Ohio 1923) State Route 13}} | SR 21 | Strasburg (north of) | Canal Dover |
| 4151|415 Newcomerstown-Stone Creek Road}} | 02004|State Route 20 (Ohio 1923) State Route 20}} | US 21 (former) | Newcomerstown | Stone Creek |
| 4161|416 Orrville-Wooster Road}} | 17701|State Route 177 (Ohio 1923) State Route 177}} | McQuaid Road | Orrville | Wooster (east of) |
| 4171|417 Orrville Northern Road}} | 09401|State Route 94 (Ohio 1923) State Route 94}} | SR 57 | Orrville | Easton |
| 4181|418 Van Wert-Delphos Road}} | 00502|State Route 5 (Ohio 1923) State Route 5}} | US 30 | Van Wert | Delphos |
| 4191|419 Van Wert-Fort Wayne Road}} | 00501|State Route 5 (Ohio 1923) State Route 5}} | US 30 | Van Wert | Indiana |
| 4201|420 Hicksville-Defiance Road}} | 01702|State Route 17 (Ohio 1923) State Route 17}} | SR 18 | Hicksville | Defiance |
| 4211|421 Ottawa-Defiance Road}} | 02203|State Route 22 (Ohio 1923) State Route 22}} | SR 15 | Ottawa | Defiance |
| 4221|422 Defiance-Fort Wayne Road}} | 03103|State Route 31 (Ohio 1923) State Route 31}} | US 24 | Defiance | Indiana |
| 4231|423 Defiance-Paulding Road}} | 11101|State Route 111 (Ohio 1923) State Route 111}} | SR 111 | Defiance | Paulding |
| 4241|424 Paulding-Bryan Road}} | 00907|State Route 9 (Ohio 1923) State Route 9}} | US 127 | Paulding | Ney |
| 4251|425 Defiance-Delphos Road}} | 06603|State Route 66 (Ohio 1923) State Route 66}} | SR 66 | Defiance | Delphos |
| 4261|426 Defiance-Auburn Road}} | 02201|State Route 22 (Ohio 1923) State Route 22}} | SR 249 | Ney | Indiana |
| 4271|427 Payne-Hicksville Road}} | 10801|State Route 108 (Ohio 1923) State Route 108}} | SR 49 | Convoy (north of) | Hicksville |
| 4281|428 Hicksville-Auburn Road}} | 19301|State Route 193 (Ohio 1923) State Route 193}} | SR 18 | Hicksville | Indiana |
| 4291|429 Paulding-Payne Road}} | 19401|State Route 194 (Ohio 1923) State Route 194}} | SR 500 | Paulding | Payne |
| 4301|430 Van Wert-Paulding Road}} | 00906|State Route 9 (Ohio 1923) State Route 9}} | US 127 | Van Wert | Paulding |
| 4311|431 Continental-Paulding Road}} | 11301|State Route 113 (Ohio 1923) State Route 113}} | SR 613 | Continental (east of) | Paulding (south of) |
| 4321|432 Paulding-Fort Wayne Road}} | 11103|State Route 111 (Ohio 1923) State Route 111}} | SR 613 | Payne | Indiana |
| 4331|433 Paulding-Woodburn Road}} | 11102|State Route 111 (Ohio 1923) State Route 111}} | SR 111 | Paulding | Payne (north of) |
| 4341|434 Van Wert-Decatur Road}} | 10901|State Route 109 (Ohio 1923) State Route 109}} | US 224 | Van Wert | Indiana |
| 4351|435 Van Wert-Ottawa Road}} | 10902|State Route 109 (Ohio 1923) State Route 109}} | US 224 | Van Wert | Ottawa |
| 4361|436 Shelby-Mansfield Road}} | 03901|State Route 39 (Ohio 1923) State Route 39}} | SR 39 | Shelby | Mansfield |
| 4371|437 Shelby-Plymouth Road}} | 06104|State Route 61 (Ohio 1923) State Route 61}} | SR 61 | Shelby | Plymouth |
| 4381|438 Bono-Port Clinton Road}} | 02303|State Route 23 (Ohio 1923) State Route 23}} | SR 2 | Bono | Port Clinton |
| 4391|439 Oak Harbor-Genoa Road}} | 16301|State Route 163 (Ohio 1923) State Route 163}} | SR 163 | Oak Harbor | Genoa |
| 4401|440 Port Clinton-Marblehead Road}} | 16303|State Route 163 (Ohio 1923) State Route 163}} | SR 163 | Port Clinton | Marblehead |
| 4411|441 West Union-Hillsboro Road}} | 13601|State Route 136 (Ohio 1923) State Route 136}} | SR 136 | West Union (west of) | Hillsboro (south of) |
| 4421|442 Steubenville-Hammondsville Road}} | 21301|State Route 213 (Ohio 1923) State Route 213}} | SR 213 | Steubenville | Knoxville |
| 4422|442 Steubenville-Hammondsville Road}} | 15202|State Route 152 (Ohio 1923) State Route 152}} | SR 213 | Knoxville | Yellow Creek |
| 4431|443 Gambier-New Castle Road}} | 20601|State Route 206 (Ohio 1923) State Route 206}} | SR 229 | Mount Vernon | Newcastle |
| 4441|444 Dorset-Richmond Center Road}} | 16701|State Route 167 (Ohio 1923) State Route 167}} | SR 167 (former) | Dorset | Pennsylvania |
| 4451|445 Dayton-Valley Road}} | 06901|State Route 69 (Ohio 1923) State Route 69}} | SR 235 | Dayton | East of Brandt |
| 4461|446 Richmond Road}} | 17501|State Route 175 (Ohio 1923) State Route 175}} | SR 175 | Bedford | Euclid (east of) |
| 4471|447 Burton-Bloomfield Road}} | 16801|State Route 168 (Ohio 1923) State Route 168}} | SR 87 | Burton | North Bloomfield |
| 4481|448 Roundhead-McGuffey Road}} | 19501|State Route 195 (Ohio 1923) State Route 195}} | SR 195 | Roundhead (north of) | McGuffey (north of) |
| 4491|449 Tiffin-Republic Road}} | 10605|State Route 106 (Ohio 1923) State Route 106}} | SR 18 | Tiffin | Republic |
| 4501|450 Roscoe Southern Road}} | 21001|State Route 210 (Ohio 1923) State Route 210}} | SR 16 | Roscoe | Coshocton (south of) |
| 4511|451 Wilmington-Sardinia Road}} | 13401|State Route 134 (Ohio 1923) State Route 134}} | SR 134 | Wilmington | Sardinia |
| 4521|452 Nicholsville-Felicity Road}} | 22201|State Route 222 (Ohio 1923) State Route 222}} | SR 222 | Nicholsville (north of) | Felicity |
| 4531|453 Columbus-Chillicothe Western Road}} | 10403|State Route 104 (Ohio 1923) State Route 104}} | SR 104 | Columbus | Chillicothe |
| 4541|454 Jeromeville-Sullivan Road}} | 05801|State Route 58 (Ohio 1923) State Route 58}} | SR 89 | Mohicanville | South of Sullivan |
| 4551|455 Monroeville-Chicago Junction Road}} | 09901|State Route 99 (Ohio 1923) State Route 99}} | SR 99 | Monroeville | Chicago Junction |
| 4561|456 Bryan-Evansport Road}} | 19201|State Route 192 (Ohio 1923) State Route 192}} | SR 192 (former) | Bryan | Evansport (north of) |
| 4571|457 Toledo-Napoleon Road}} | 11001|State Route 110 (Ohio 1923) State Route 110}} | SR 110 | Napoleon | North of McClure |
| 4581|458 Felicity Southern Road}} | 22202|State Route 222 (Ohio 1923) State Route 222}} | SR 133 | Felicity | Utopia (west of) |
| 4591|459 Allensburg-Lynchburg Road}} | 13501|State Route 135 (Ohio 1923) State Route 135}} | SR 135 | Allensburg | Lynchburg |
| 4601|460 Cleveland-Kent Road}} | 08201|State Route 82 (Ohio 1923) State Route 82}} | SR 43 | Cleveland | Aurora |
| 4602|460 Cleveland-Kent Road}} | 08901|State Route 89 (Ohio 1923) State Route 89}} | SR 43 | Aurora | Suffield |
| 4611|461 Baltimore-Reynoldsburg Road}} | 20401|State Route 204 (Ohio 1923) State Route 204}} | SR 256 | Baltimore | Reynoldsburg |
| 4621|462 Lancaster-Kirkersville Road}} | 15802|State Route 158 (Ohio 1923) State Route 158}} | SR 158 | Lancaster | Kirkersville |
| 4631|463 Lancaster-Circleville Northern Road}} | 15801|State Route 158 (Ohio 1923) State Route 158}} | SR 188 | Lancaster | Circleville |
| 4641|464 Beamsville-Versailles Road}} | 19901|State Route 199 (Ohio 1923) State Route 199}} | SR 242 (former) | Beamsville | Versailles |
| 4651|465 Orrville Southern Road}} | 09402|State Route 94 (Ohio 1923) State Route 94}} | SR 57 | Orrville | Dalton (west of) |
| 4661|466 Solon-Willoughby Road}} | 09102|State Route 91 (Ohio 1923) State Route 91}} | SR 91 | Solon | Willoughby |
| 4671|467 Hamilton-Scipio Road}} | 12701|State Route 127 (Ohio 1923) State Route 127}} | SR 129 | Hamilton | Scipio |
| 4681|468 Versailles Western Road}} | 06801|State Route 68 (Ohio 1923) State Route 68}} | SR 47 | Versailles | Dawn |
| 4691|469 Harrisburg-Westville Road}} | 17301|State Route 173 (Ohio 1923) State Route 173}} | US 62 | Harrisburg | Beloit (south of) |
| 4701|470 Millersport-Mount Perry Road}} | 20402|State Route 204 (Ohio 1923) State Route 204}} | SR 204 | Millersport (west of) | Mount Perry (south of) |
| 4711|471 Troy-Urbana Southern Road}} | 05501|State Route 55 (Ohio 1923) State Route 55}} | SR 55 | Troy | Urbana |
| 4721|472 Springfield-Jamestown Road}} | 07202|State Route 72 (Ohio 1923) State Route 72}} | SR 72 | Springfield | Jamestown |
| 4731|473 Jamestown-Hillsboro Road}} | 07201|State Route 72 (Ohio 1923) State Route 72}} | SR 72 | Jamestown | Hillsboro (north of) |
| 4741|474 Aurora-Warren Road}} | 08202|State Route 82 (Ohio 1923) State Route 82}} | SR 82 | Aurora | Warren (west of) |
| 4751|475 Hambden-Andover Road}} | 08503|State Route 85 (Ohio 1923) State Route 85}} | US 6 | Hambden | Andover |
| 4761|476 Ashtabula-Sheffield Road}} | 08301|State Route 83 (Ohio 1923) State Route 83}} | SR 84 | Ashtabula | Pennsylvania |
| 4771|477 Coshocton-Plainfield-Cambridge Road}} | 04204|State Route 42 (Ohio 1923) State Route 42}} | SR 541 | Coshocton | Kimbolton |
| 4781|478 Ganges-Plymouth Road}} | 17801|State Route 178 (Ohio 1923) State Route 178}} | SR 603, Ganges 5 Points Road | Ganges (south of) | Plymouth |
| 4791|479 Newark-Fallsburg Road}} | 07902|State Route 79 (Ohio 1923) State Route 79}} | SR 79 | Newark | Fallsburg (east of) |
| 4801|480 Williamsburg-Owensville Road}} | 13203|State Route 132 (Ohio 1923) State Route 132}} | SR 276 | Williamsburg | Owensville |
| 4811|481 Washington-Bloomingburg Road}} | 03803|State Route 38 (Ohio 1923) State Route 38}} | SR 38 (former) | Washington Court House | Bloomingburg |
| 4821|482 St. Marys-Monticello Road}} | 19801|State Route 198 (Ohio 1923) State Route 198}} | SR 116 | St. Marys | Monticello (north of) |
| 4831|483 Bellville-Lexington Road}} | 09701|State Route 97 (Ohio 1923) State Route 97}} | SR 97 | Bellville | Lexington |
| 4841|484 McConnelsville-Cambridge Road}} | 21501|State Route 215 (Ohio 1923) State Route 215}} | SR 83, SR 146 | McConnelsville (east of) | Cambridge (south of) |
| 4851|485 Bucyrus-Clyde Road}} | 06203|State Route 62 (Ohio 1923) State Route 62}} | SR 19 | Broken Sword | North of Republic |
| 4852|485 Bucyrus-Clyde Road}} | 22801|State Route 228 (Ohio 1923) State Route 228}} | SR 228 | North of Republic | Southwest of Clyde |
| 4861|486 Canfield-Poland Road}} | 01714|State Route 17 (Ohio 1923) State Route 17}} | US 224 | Canfield | Pennsylvania |
| 4871|487 Dayton-Troy Eastern Road}} | 20201|State Route 202 (Ohio 1923) State Route 202}} | SR 202 | Dayton | Troy |
| 4881|488 Lisbon-Wellsville Road}} | 15301|State Route 153 (Ohio 1923) State Route 153}} | SR 45 | Lisbon (south of) | Wellsville |
| 4891|489 Carrollton-Malvern Road}} | 04303|State Route 43 (Ohio 1923) State Route 43}} | SR 43 | Carrollton (north of) | Malvern |
| 4901|490 Bucyrus-Nevada-Upper Sandusky Road}} | 18201|State Route 182 (Ohio 1923) State Route 182}} | SR 182 (former) | Bucyrus | Upper Sandusky |
| 4911|491 Holgate-Miller City Road}} | 18801|State Route 188 (Ohio 1923) State Route 188}} | SR 108 | Holgate | Miller City (south of) |
| 4921|492 Middleport-Bradbury Road}} | 14301|State Route 143 (Ohio 1923) State Route 143}} | Bradbury Road | Middleport | East of Rutland |
| 4931|493 Road}} | 00513|State Route 5 (Ohio 1923) State Route 5}} | US 30 | Osnaburg | Minerva |
| 4941|494 Road}} | 13101|State Route 131 (Ohio 1923) State Route 131}} | SR 131 | Milford | Vera Cruz |
| 4951|495 Road}} | 23001|State Route 230 (Ohio 1923) State Route 230}} | SR 230 (former) | Fremont (southwest of) | Fremont (west of) |
| 4961|496 Road}} | 19601|State Route 196 (Ohio 1923) State Route 196}} | SR 196 | New Hampshire | Westminster |
| 4971|497 Road}} | 05401|State Route 54 (Ohio 1923) State Route 54}} | SR 54 | South Charleston | Urbana |
| 4981|498 Road}} | 20001|State Route 200 (Ohio 1923) State Route 200}} | US 36 | Greenville (south of) | Indiana |
| 4991|499 Road}} | 17601|State Route 176 (Ohio 1923) State Route 176}} | SR 176 | Richfield | Cleveland |
| 5001|500 Road}} | 17002|State Route 170 (Ohio 1923) State Route 170}} | SR 170 | Unity | Petersburg |
| 5011|501 Mansfield-Crestline Road}} | 00507|State Route 5 (Ohio 1923) State Route 5}} | US 30 | Mansfield | Crestline |
| 5021|502 Youngstown-East Liverpool Road}} | 00705|State Route 7 (Ohio 1923) State Route 7}} | SR 7, SR 164 | East Liverpool | Youngstown |
| 5031|503 Road}} | 18701|State Route 187 (Ohio 1923) State Route 187}} | SR 613 | Leipsic | McComb |
| 5041|504 Road}} | 10402|State Route 104 (Ohio 1923) State Route 104}} | SR 104 | Lucasville (west of) | Waverly |
| 5051|505 Road}} | 07801|State Route 78 (Ohio 1923) State Route 78}} | SR 78 | Glouster | McConnelsville |
| 5061|506 Road}} | 04804|State Route 48 (Ohio 1923) State Route 48}} | SR 800 | West of Hendrysburg | Dennison |
| 5071|507 Road}} | 15701|State Route 157 (Ohio 1923) State Route 157}} | SR 79 | Lakeside | Hebron (east of) |
| 5081|508 Road}} | 21801|State Route 218 (Ohio 1923) State Route 218}} | SR 218, SR 553 | Crown City | Gallipolis (south of) |
| 5091|509 Road}} | 21901|State Route 219 (Ohio 1923) State Route 219}} | SR 243 (former) | Proctorville | Athalia (south of) |
| 5101|510 Road}} | 10602|State Route 106 (Ohio 1923) State Route 106}} | SR 189 | Fort Jennings | Vaughnsville |
| 5111|511 Canton-Navarre Road}} | 01904|State Route 19 (Ohio 1923) State Route 19}} | US 62 (former) | Canton | Navarre |
| 5121|512 Road}} | 00504|State Route 5 (Ohio 1923) State Route 5}} | US 30 | Gomer | Upper Sandusky |
| 5131|513 Road}} | 07601|State Route 76 (Ohio 1923) State Route 76}} | SR 83 | New Concord | Bloomfield |
| 5141|514 Road}} | 08004|State Route 80 (Ohio 1923) State Route 80}} | SR 183, SR 700, Rock Spring Road | Atwater Center | Welshfield |
| 5151|515 Road}} | 06204|State Route 62 (Ohio 1923) State Route 62}} | SR 19 | North of Republic | Fremont |
| 5161|516 Salem-Warren Road}} | 04502|State Route 45 (Ohio 1923) State Route 45}} | SR 45 | Salem | Warren |
| 5171|517 Road}} | 11401|State Route 114 (Ohio 1923) State Route 114}} | SR 114 | Indiana | Mandale |
| 5181|518 Road}} | 21601|State Route 216 (Ohio 1923) State Route 216}} | SR 216, SR 78 | Nelsonville | New Straitsville |
| 5191|519 Road}} | 20801|State Route 208 (Ohio 1923) State Route 208}} | SR 208 | Dresden | Adamsville |
| 05901|State Route 59 (Ohio 1923) State Route 59}} | SR 61 | Norwalk | Berlinville |
| 06107|State Route 61 (Ohio 1923) State Route 61}} | SR 61 | Berlinville | Ceylon |
| 08400|State Route 84 (Ohio 1923) State Route 84}} | SR 307 | Madison (south of) | Geneva (south of) |
| 08902|State Route 89 (Ohio 1923) State Route 89}} | SR 43 | Suffield | Canton |
| 16602|State Route 166 (Ohio 1923) State Route 166}} | SR 528 | Madison | North Madison |
| 17502|State Route 175 (Ohio 1923) State Route 175}} | SR 283 | Euclid | Painesville |
| 23101|State Route 231 (Ohio 1923) State Route 231}} | SR 231 | Nevada | Nevada (north of) |
1. ^{{cite news |title = New System in Numbering State Roads |date = July 24, 1923 |work = Dayton Daily News |pages = 1-2 |via = Newspapers.com }}
{{DEFAULTSORT:1923 Ohio State Highway Renumbering}}