The 1970 United Kingdom general election was held on Thursday 18 June 1970. It resulted in a surprise victory for the Conservative Party under leader Edward Heath, which defeated the governing Labour Party under Prime Minister Harold Wilson. The Liberal Party, under its new leader Jeremy Thorpe, lost half its seats. The Conservatives, including the Ulster Unionist Party (UUP), secured a majority of 30 seats. This general election was the first in which people could vote from the age of 18, after passage of the Representation of the People Act the previous year, and the first UK election where party, and not just candidate names were allowed to be put on the ballots.

James Harold Wilson, Baron Wilson of Rievaulx, was a British statesman and Labour Party politician who served as Prime Minister of the United Kingdom twice, from October 1964 to June 1970 and again from March 1974 to April 1976. He was the Leader of the Labour Party from 1963 to 1976, and was a Member of Parliament (MP) from 1945 to 1983. Wilson is the only Labour leader to have formed administrations following four general elections.