Elections to the United States House of Representatives for the 31st Congress were held at various dates in each state between August 7, 1848 (Arkansas, Illinois, Iowa and Missouri) and November 6, 1849 (Mississippi). California also elected two Representatives at-large on November 11, 1849, in anticipation of statehood. They were seated September 11, 1850. The Democrats gained one seat, while the Whigs lost their majority they had gained just two years earlier in the election of 1846. This was the first election in the U.S. House that resulted in no party gaining an overall majority of seats.