James Harold McCusker (7 February 1940 – 12 February 1990) was a Northern Ireland Ulster Unionist Party politician who served as the Deputy Leader of the UUP Assembly Group from 1982 to 1986.^[1]

The younger son of Jim and Lily McCusker (he had one older brother), he was born and raised in the heart of Lurgan. Educated at Lurgan Model Primary School, Lurgan College and Stranmillis University College, before qualifying as a teacher. Before entering politics he worked in industry, latterly with Goodyear, in their Craigavon Plant.

He represented the Armagh constituency, and was first returned to the British House of Commons at the February 1974 general election. He was returned again in October 1974 and in the 1979 election, having supported the Callaghan government in the vote of no confidence that had toppled it.^[2] In 1982 he topped the poll in Armagh in the Assembly election.

At the 1983 general election, McCusker was returned for the new seat of Upper Bann. Alongside other Unionist MPs, he resigned his seat in protest at the Anglo-Irish Agreement in 1985, in order to contest his seat again at the ensuing by-election. He was returned again at the 1987 general election, which was to prove his last — he died of cancer in 1990, causing another by-election, which was won by future Ulster Unionist leader David Trimble.

This section does not cite any sources. (November 2015)

McCusker was an Orangeman and staunch Unionist. He was married, with 3 sons, Moore, James and Colin. His youngest son, Colin (who was 18 at the time of his father's death), ran for the Northern Ireland Assembly in 2011, polling 3,402 first preference votes, but failed to get elected. He served on Craigavon Borough Council from February 2012 to March 2015 as an Ulster Unionist, and was elected the last Mayor of Craigavon in June 2014. Colin was elected to the new Armagh City, Banbridge and Craigavon Borough Council in May 2014.

Prior to his death from cancer in 1990, five days after his 50th birthday, McCusker was expected to rise further in the Ulster Unionist Party and British political scenes, due to his ability and popularity among his peers and the wider public. He was a member of the Lurgan Circuit of the Methodist Church in Ireland.