declined the seat.New member elected January 5, 1846.Democratic hold. | nowrap | |- ! | Sterling Price | | Democratic | 1844 | | Incumbent resigned August 12, 1846 to serve in the Mexican–American War.New member elected in 1846 and seated December 7, 1846.Democratic hold.Successor had not been elected to the next term, see below. | nowrap | |- ! | Archibald Yell | | Democratic | 18361840 1844 | | Incumbent resigned July 1, 1846 to serve in the United States Volunteers.New member elected December 14, 1846.Whig gain.Successor seated February 6, 1847.Successor had not been elected to the next term, see below. | nowrap | |- ! | Edward D. Baker | | Whig | 1844 | | Incumbent resigned January 15, 1847 to join the Illinois Volunteer Infantry.New member elected January 20, 1847 to finish the term.Whig hold.Successor had not been a candidate to the next term, see below. | nowrap | |- ! | Edward Bradley | | 1846 | | Incumbent died August 5, 1847.New member elected November 2, 1847.Democratic hold. | nowrap | |- ! |- ! |} Alabama Elections were held August 2, 1847, after the March 4, 1847 beginning of the term, but before the House first convened in December 1847. |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Arkansas Arkansas elected its sole member August 3, 1846. |- ! | Archibald Yell | | Democratic | 18361840 1844 | | Incumbent resigned July 1, 1846 to serve in the United States Volunteers.New member elected.Democratic hold.Winner was not elected to finish the current term. | nowrap | |} Connecticut Elections were held April 5, 1847, after the March 4, 1847 beginning of the term, but before the House first convened in December 1847. |- ! |- ! |- ! |- ! |} Delaware The election was held November 10, 1846. |- ! |} Florida The election was held October 5, 1846. |- ! | William H. Brockenbrough | | Democratic | 1845 | | Incumbent retired.New member elected.Whig gain. | nowrap | |} Georgia Elections were held October 5, 1846. |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Illinois Elections were held August 3, 1846. |- ! |- ! |- ! |- ! |- ! |- ! |- ! | Edward D. Baker | | Whig |