Columns: District | Vacator | Reason for change | Successor | Date successor seated
Virginia 2nd | George Dromgoole ( D ) | Died April 27, 1847 | Richard K. Meade ( D ) | Seated August 5, 1847 | Michigan 2nd | Edward Bradley ( D ) | Died August 5, 1847 | Charles E. Stuart ( D ) | Seated December 6, 1847 | Pennsylvania 6th | John W. Hornbeck ( W ) | Died January 16, 1848 | Samuel A. Bridges ( D ) | Seated March 6, 1848 | Massachusetts 8th | John Quincy Adams ( W ) | Died February 23, 1848 | Horace Mann ( W ) | Seated April 3, 1848 | New York 27th | John M. Holley ( W ) | Died March 8, 1848 | Esbon Blackmar ( W ) | Seated December 4, 1848 | South Carolina 1st | James A. Black ( D ) | Died April 3, 1848 | Daniel Wallace ( D ) | Seated June 12, 1848