Columns: District | Vacator | Reason for change | Successor | Date successor seated
New York 7th | Vacant | Rep. John J. Delaney died during previous congress | Louis B. Heller (D) | February 15, 1949 | New York 20th | Sol Bloom (D) | Died March 7, 1949 | Franklin Delano Roosevelt, Jr. (Lib) | May 17, 1949 | New York 10th | Andrew L. Somers (D) | Died April 6, 1949 | Edna F. Kelly (D) | November 8, 1949 | Pennsylvania 26th | Robert L. Coffey (D) | Died April 20, 1949 | John P. Saylor (R) | September 13, 1949 | California 5th | Richard J. Welch (R) | Died September 10, 1949 | John Shelley (D) | November 8, 1949 | Massachusetts 6th | George J. Bates (R) | Died November 1, 1949 | William H. Bates (R) | February 14, 1950 | Illinois 5th | Martin Gorski (D) | Died December 4, 1949 | Vacant | Not filled for the remainder of this term | Virginia 1st | S. Otis Bland (D) | Died February 16, 1950 | Edward J. Robeson, Jr. (D) | May 2, 1950 | Illinois 13th | Ralph E. Church (R) | Died March 21, 1950 | Vacant | Not filled for the remainder of this term | Michigan 16th | John Lesinski, Sr. (D) | Died May 27, 1950 | Vacant | Not filled for the remainder of this term | North Dakota At-large | William Lemke (R) | Died May 30, 1950 | Vacant | Not filled for the remainder of this term | North Carolina 11th | Alfred L. Bulwinkle (D) | Died August 31, 1950 | Woodrow W. Jones (D) | November 7, 1950