Dumfriesshire was a county constituency represented in the House of Commons of Great Britain from 1708 to 1801 and in the House of Commons of the Parliament of the United Kingdom from 1801 until 2005. It was known as Dumfries from 1950.

The 1931 United Kingdom general election was held on Tuesday 27 October 1931 and saw a landslide election victory for the National Government which had been formed two months previously after the collapse of the second Labour government. Collectively, the parties forming the National Government won 67% of the votes and 554 seats out of 615. Although the bulk of the National Government's support came from the Conservative Party and the Conservatives won 470 seats, National Labour leader Ramsay MacDonald remained as Prime Minister. The Labour Party suffered its greatest defeat, losing four out of every five seats compared with the previous election, including the seat of its leader Arthur Henderson. Ivor Bulmer-Thomas said the results "were the most astonishing in the history of the British party system". It is the most recent election in which one party received an absolute majority of the votes cast, and the last UK general election not to take place on a Thursday. It would be the last election until 1997 in which a party won over 400 seats in the House of Commons.