The 2005 Ulster Unionist Party leadership election began on 7 May 2005 when David Trimble resigned as leader of the Ulster Unionist Party following his party's poor performance in the 2005 general election when it lost all but one of its seats, including Trimble's own. Following his resignation, the UUP's Executive Committee charged Sir Reg Empey, Lady Hermon and Lord Rogan with the interim leadership of the Party. Trimble's successor was elected by delegates to the Ulster Unionist Council who met on 24 June 2005. After two rounds of voting the election was won by Sir Reg Empey.