Of the 10 Wisconsin incumbents, 8 were re-elected, 1 retired, and 1 lost re-election.
| District | Incumbent | Party | First
elected | Result | Candidates |
|---|
| Wisconsin|1|X}} | Les Aspin | Democratic | 1970 | Incumbent re-elected. | √ Les Aspin (Democratic) 64.4%
Merrill E. Stalbaum (Republican) 34.9%
Charles J. Fortner (American) 0.7% |
| Wisconsin|2|X}} | Robert W. Kastenmeier | Democratic | 1958 | Incumbent re-elected. | √ Robert W. Kastenmeier (Democratic) 68.2%
J. Michael Kelly (Republican) 31.4%
Lavern F. Krohn (American) 0.5% |
| Wisconsin|3|X}} | Vernon Wallace Thomson | Republican | 1960 | Incumbent re-elected. | √ Vernon Wallace Thomson (Republican) 54.7%
Walter Thoresen (Democratic) 44.6%
Keith Ellison (American) 0.7% |
| Wisconsin|4|X}} | Clement J. Zablocki | Democratic | 1948 | Incumbent re-elected. | √ Clement J. Zablocki (Democratic) 75.7%
Phillip D. Mrozinski (Republican) 22.8%
Eugene Annell (American) 1.5% |
| Wisconsin|5|X}} | Henry S. Reuss | Democratic | 1954 | Incumbent re-elected. | √ Henry S. Reuss (Democratic) 77.3%
Frederick Van Hecke (Republican) 20.4%
George Sprague (American) 1.7%
R. Julian Chapman (Independent) 0.6% |
| Wisconsin|6|X}} | William A. Steiger | Republican | 1966 | Incumbent re-elected. | √ William A. Steiger (Republican) 65.8%
James A. Adams (Democratic) 32.0%
Valeria M. Sitter (AI) 2.1% |
| {{ushr|Wisconsin|7|X}} | Dave Obey | Democratic | 1969 | Incumbent re-elected. | √ Dave Obey (Democratic) 62.8%
Alvin E. O'Konski (Republican) 37.2% |
| {{Small>Redistricted from the 10th district}}Republican | 1942 | Incumbent lost re-election.
Republican loss. |
| Wisconsin|8|X}} | John W. Byrnes | Republican | 1944 | Incumbent retired.
New member elected.
Republican hold. | √ Harold Vernon Froehlich (Republican) 50.4%
Robert J. Cornell (Democratic) 48.5%
Clyde Bunker (American) 1.1% |
| Wisconsin|9|X}} | Glenn R. Davis | Republican | 1964 | Incumbent re-elected. | √ Glenn R. Davis (Republican) 61.4%
Ralph A. Fine (Democratic) 36.7%
George Reed (American) 1.9% |