Elections to the United States House of Representatives for the 30th Congress were held at different dates in the various states, from August 2, 1846 (Missouri) to November 2, 1847 (Mississippi and Louisiana). The Whigs picked up 37 seats to win 116 seats, while the rival Democrats lost 30 and fell to 112 seats in the House. The result was a switch of partisan control of the House, with the Whigs gaining a narrow majority of just four seats. The Whigs picked up seats in New England and the South. The nativist American Party, dedicated to opposition to immigration and anti-Catholicism, lost five of its Representatives and was left with only a single seat. In addition, one Independent, Amos Tuck, was elected to New Hampshire's 1st District.