James Hamilton, 5th Duke of Abercorn (born 4 July 1934) is a Northern Irish peer and politician, and currently Lord Steward of the Household. He is also a baronet.
His full style is: The Most Noble James, Duke of Abercorn, Knight of the Most Noble Order of the Garter.
Hamilton was educated at Eton College and the Royal Agricultural College. In 1952, he was commissioned into the Grenadier Guards. From 1964 to 1970, he was MP for Fermanagh and South Tyrone. In 1999, he was appointed a Knight of the Order of the Garter, and he is colonel of the Irish Guards; additionally, he was appointed Lord Steward in 2001.