Robert Law McCartney, KC (born 24 April 1936) is a Northern Irish barrister and Unionist politician who was the founder and leader of the UK Unionist Party (UKUP) from 1995 to 2008. He was initially a member of the Ulster Unionist Party (UUP) but was expelled in June 1987 when he refused to withdraw from the general election of that year. He stood against the incumbent Popular Unionist Party MP Sir James Kilfedder in North Down as a "Real Unionist" but failed to win the seat.