The 2005 United Kingdom general election was held on Thursday 5 May 2005, to elect 646 members to the House of Commons. The governing Labour Party, led by Tony Blair, won its third consecutive victory, with Blair becoming the second Labour leader after Harold Wilson to form three majority governments. However, its majority fell to 66 seats; the majority it won four years earlier had been of 167 seats. This would be the last election not won by the Conservative Party as of 2024.This was the first time the Labour Party had won a third consecutive election, and as of 2024 remains the party's most recent general election victory.

The leader of the Labour Party is the highest position within the United Kingdom's Labour Party. The current holder of the position is Keir Starmer, who was elected to the position on 4 April 2020, following his victory in the party's leadership election.