1849 | | Incumbent retired.New member elected.Democratic hold. |} Connecticut Elections were held April 7, 1851, after the March 4, 1851 beginning of the term, but before the House first convened in December 1851. |- ! |- ! |- ! |- ! |} Delaware The election was held November 12, 1850. |- ! |} Florida The election was held October 7, 1850. |- ! |} Georgia Elections were held October 6, 1851. |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Illinois Elections were held November 5, 1850. |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Indiana Elections were held August 4, 1851, after the March 4, 1851 beginning of the term, but before the House first convened in December 1851. |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Iowa Elections were held August 5, 1850. |- ! |- ! |} Kentucky Elections were held August 4, 1851, after the March 4, 1851 beginning of the term, but before the House first convened in December 1851. |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Louisiana Elections were held November 4, 1851, after the March 4, 1851 beginning of the term, but before the House first convened in December 1851. |- ! |- ! |- ! |- ! |} Maine Elections were held September 9, 1850. |- ! |- ! |- ! |- ! |- ! |- ! |- ! |} Maryland Elections were held October 1, 1851 elections were after the March 4, 1851 beginning of the new term, but still before the Congress convened in December 1851. |- ! |- ! |- ! |- ! |- ! |- ! |} Massachusetts Elections were held November 11, 1850, but at least one district's elections went to multiple ballots into 1851. |- ! |- ! |- ! |- ! | colspan=3 | Vacant due to failure to elect. | | New member elected on the 4th ballot.Whig gain. | nowrap | |- ! |- ! |- ! | Julius Rockwell | | Whig | 1844 | | Incumbent lost re-election.New member elected on the fourth ballot.Whig hold. | nowrap | |- ! |- ! |- ! |} Michigan Elections were