The 1951 United Kingdom general election was held twenty months after the 1950 general election, which the Labour Party had won with a slim majority of just five seats. The Labour government called a snap election for Thursday 25 October 1951 in the hope of increasing its parliamentary majority. However, despite winning the popular vote and achieving both the highest-ever total vote at the time and the highest percentage vote share, Labour won fewer seats than the Conservative Party. That was caused mainly by the collapse of the Liberal vote, which enabled the Conservatives to win seats by default. The record high vote total remained until it was surpassed by the Conservative Party in 1992 and again in 2019.

The 1950 United Kingdom general election was the first to be held after a full term of a majority Labour government. The general election was held on Thursday 23 February 1950, and was also the first to be held following the abolition of plural voting and university constituencies. The government's lead over the Conservative Party shrank dramatically, and Labour was returned to power but with an overall majority significantly reduced from 146 to just 5. There was a 2.8% national swing towards the Conservatives, who gained 90 seats. Labour called another general election the following year, which the Conservative Party won, returning Churchill to government after six years in opposition.