The 1872–73 United States House of Representatives elections were held on various dates in various states between June 4, 1872 and April 7, 1873. Each state set its own date for its elections to the House of Representatives before the first session of the 43rd United States Congress convened on December 1, 1873. They coincided with the re-election of United States President Ulysses S. Grant. The congressional reapportionment based on the 1870 United States Census increased the number of House seats to 292. Grant's Republican Party increased its majority greatly, partly at the expense of the opposition Democratic Party and partly by adding 49 new seats to the House. The pro-industry outlook of the Republicans appealed to many Northern voters, especially as the post-war economy exploded, and this allowed the party to flourish as the Industrial Revolution grew more widespread. The Republicans also benefited from a continuing association with Civil War victory as well as disarray amongst Democratic leadership. Election summaries Following the 1870 Census, the House was reapportioned, initially adding 40 seats, followed by a subsequent amendment to the apportionment act adding another seat to 9 states, resulting in a total increase of 49 seats. No states lost seats, 10 states had no change, 13 states gained 1 seat each, 9 states gained 2 seats, 3 states gained 3 seats, 1 State gained 4 seats, and 1 State gained 5 seats. Prior to the supplemental act, two states (New Hampshire and Vermont) had each lost 1 seat. This was the first reapportionment after the repeal of the three-fifths compromise by the 14th Amendment. Election dates In 1845, Congress passed a law providing for a uniform nationwide date for choosing Presidential electors. This law did not affect election dates for Congress, which remained within the jurisdiction of State governments, but over time, the States moved their Congressional elections to this date as well. In 1872–73, there were still 9 states with earlier election dates, and 2 states with later election dates: Early elections (1872): June 4 Oregon August 1 North Carolina August 27 West Virginia September 3 Vermont September 9 Maine October 8 Indiana, Nebraska, Ohio, Pennsylvania Late elections (1873): March 11, 1873 New Hampshire April 7, 1873 Connecticut Special elections : 1872 : 1873 : 1872 : 1873 : 1873 : 1873 : 1872 Alabama Arkansas California A new seat was added, following the 1870 U.S. Census, bringing the