Rochester was a parliamentary constituency in Kent. It returned two members of parliament (MPs) to the House of Commons of England from 1295 to 1707, then to the House of Commons of Great Britain from 1708 to 1800, and finally to the House of Commons of the Parliament of the United Kingdom from 1801 until the 1885 general election, when its representation was reduced to one seat.

The 1918 United Kingdom general election was called immediately after the Armistice with Germany which ended the First World War, and was held on Saturday, 14 December 1918. The governing coalition, under Prime Minister David Lloyd George, sent letters of endorsement to candidates who supported the coalition government. These were nicknamed "Coalition Coupons", and led to the election being known as the "coupon election". The result was a massive landslide in favour of the coalition, comprising primarily the Conservatives and Coalition Liberals, with massive losses for Liberals who were not endorsed. Nearly all the Liberal MPs without coupons were defeated, including party leader H. H. Asquith.