James Hamilton, 6th Earl of Abercorn

James Hamilton, 6th Earl of Abercorn, PC (Ire) (c. 1661 – 28 November 1734) was a Scottish and Irish nobleman, the son of Colonel James Hamilton and Elizabeth Colepeper, daughter of John Colepeper, 1st Baron Colepeper. He belonged to a junior branch of the Abercorn family but unexpectedly inherited the Earldom in 1701 on the death of a distant cousin.

As Captain James Hamilton, he was appointed by James II to the Privy Council of Ireland, but deserted him for the cause of William, and served in the defence of Londonderry in 1689. He succeeded to his grandfather's baronetcy in 1697. Between 1692 and 1699, he represented Tyrone in the Irish House of Commons. Upon the death of his second cousin Charles in 1701, he succeeded as Earl of Abercorn, Baron Hamilton of Strabane, etc. but continued to live in Ireland. He was rewarded by William with the titles of Viscount Strabane and Baron Mountcastle, in the Peerage of Ireland, on 2 December 1701. He was a privy councillor in the reigns of Anne, George I, and George II. He died 28 November 1734, and was buried in Henry VII Chapel in Westminster Abbey.

He married Elizabeth Reading, daughter of Sir Robert Reading, 1st Baronet and Jane Hannay, widow of Charles Coote, 1st Earl of Mountrath, in January 1684. They had the following children:

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