There were six special elections to the United States House of Representatives in 1991 during the 102nd United States Congress.
Elections are listed by date and district.
|- ! | data-sort-value="Conte, Silvio O." | Silvio O. Conte | | Republican | 1958 | data-sort-value=-1 | Incumbent died February 8, 1991.<br/>New member elected June 18, 1991.<br/>Democratic gain. | nowrap |
|- ! | data-sort-value="Madigan, Edward Rell." | Edward Rell Madigan | | Republican | 1972 | data-sort-value=0 | Incumbent resigned upon appointment as U.S. Secretary of Agriculture. <br/>New member elected July 2, 1991.<br/>Republican hold. | nowrap |
|- ! | data-sort-value="Bartlett, Steve." | Steve Bartlett | | Republican | 1982 | data-sort-value=0 | Incumbent resigned March 11, 1991 to become Mayor of Dallas. <br/>New member elected May 18, 1991.<br/>Republican hold. | nowrap |
|- ! | data-sort-value="Udall, Mo" | Mo Udall | | Democratic | 1961 | data-sort-value=0 | Incumbent resigned for health reasons.<br/>New member elected October 3, 1991.<br/>Democratic hold. | nowrap |
|- ! | data-sort-value="Gray, William H." | William H. Gray III | | Democratic | 1978 | data-sort-value=0 | Incumbent resigned to become director of the UNCF.<br/>New member elected November 5, 1991.<br/>Democratic hold. | nowrap |
|- ! | data-sort-value="Slaughter, D. French." | D. French Slaughter Jr. | | Republican | 1984 | data-sort-value=0 | Incumbent resigned due to ill health (stroke).<br/>New member elected November 5, 1991.<br/>Republican hold. | nowrap |