| | Democratic | 1974 | Incumbent re-elected. | nowrap | |- ! | William C. Wampler | | Republican | 19521954 1966 | Incumbent re-elected. | nowrap | |- ! | Joseph L. Fisher | | Democratic | 1974 | Incumbent re-elected. | nowrap | |} Washington |- ! | Joel Pritchard | | Republican | 1972 | Incumbent re-elected. | nowrap | |- ! | Lloyd Meeds | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | Don Bonker | | Democratic | 1974 | Incumbent re-elected. | nowrap | |- ! | Mike McCormack | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | Tom Foley | | Democratic | 1964 | Incumbent re-elected. | nowrap | |- ! | Floyd Hicks | | Democratic | 1964 | | Incumbent retired.New member elected.Democratic hold. | nowrap | |- ! | Brock Adams | | Democratic | 1964 | Incumbent re-elected. | nowrap | |} West Virginia |- ! | Bob Mollohan | | Democratic | 19521956 1968 | Incumbent re-elected. | nowrap | |- ! | Harley Orrin Staggers | | Democratic | 1948 | Incumbent re-elected. | nowrap | |- ! | John M. Slack Jr. | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Ken Hechler | | Democratic | 1958 | | Incumbent retired to run for governor.New member elected. Democratic hold. | nowrap | |} Wisconsin |- ! | Les Aspin | | Democratic | 1970 | Incumbent re-elected. | nowrap | |- ! | Robert Kastenmeier | | Democratic | 1958 | Incumbent re-elected. | nowrap | |- ! | Alvin Baldus | | Democratic | 1974 | Incumbent re-elected. | nowrap | |- ! | Clement J. Zablocki | | Democratic | 1948 | Incumbent re-elected. | nowrap | |- ! | Henry S. Reuss | | Democratic | 1954 | Incumbent re-elected. | nowrap | |- ! | William A. Steiger | | Republican | 1966 | Incumbent re-elected. | nowrap | |- ! | Dave Obey | | Democratic | 1969 | Incumbent re-elected. | nowrap | |- ! | Robert John Cornell | | Democratic | 1974 | Incumbent re-elected. | nowrap | |- ! | Bob Kasten | | Republican | 1974 | Incumbent re-elected. | nowrap | |} Wyoming |- ! | Teno