The 1878–79 United States House of Representatives elections were held on various dates in various states between June 3, 1878, and September 3, 1879. Each state set its own date for its elections to the House of Representatives before or after the first session of the 46th United States Congress convened on March 18, 1879. Elections were held for all 293 seats, representing 38 states. This was the last election cycle that at least one state held its regular congressional election in an odd-numbered year.

The 1876–77 United States House of Representatives elections were held on various dates in various states between June 5, 1876, and March 13, 1877. Each state set its own date for its elections to the House of Representatives before the first session of the 45th United States Congress convened on October 15, 1877. The size of the House increased to 293 seats with the addition of the new state of Colorado.