List of elections
| District | Incumbent | This race | |||
|---|---|---|---|---|---|
| Member | Party | First elected | Results | Candidates | |
| Arkansas 6 | William F. Norrell | Democratic | November 8, 1938 | Incumbent died February 15, 1961. New member elected April 18, 1961. Democratic hold. |
|
| Arizona 2 | Stewart Udall | Democratic | November 2, 1954 | Incumbent resigned January 18, 1961, to become U.S Secretary of the Interior. New member elected May 2, 1961. Democratic hold. |
|
| Pennsylvania 16 | Walter M. Mumma | Republican | November 4, 1952 | Incumbent died February 25, 1961. New member elected May 16, 1961. Republican hold. |
|
| Tennessee 1 | B. Carroll Reece | Republican | November 7, 1950 | Incumbent died March 19, 1961. New member elected May 16, 1961. Republican hold. |
|
| Texas 20 | Paul J. Kilday | Democratic | November 8, 1938 | Incumbent resigned September 24, 1961, to become judge of U.S. Court of Appeals for the Armed Forces. New member elected November 4, 1961. Democratic hold. |
|
| Michigan 1 | Thaddeus M. Machrowicz | Democratic | November 7, 1950 | Incumbent resigned September 18, 1961, to become judge of the U.S. District Court for the Eastern District of Michigan. New member elected November 7, 1961. Democratic hold. |
|
| Louisiana 4 | Overton Brooks | Democratic | November 3, 1936 | Incumbent died September 16, 1961. New member elected December 19, 1961. Democratic hold. |
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