William North, 6th Baron North

William North, 6th Baron North and 2nd Baron Grey (22 December 1678 – 31 October 1734), known as Lord North and Grey, was an English soldier and Jacobite, and a peer for more than forty years. He had the right to sit in the House of Lords between 1698 and 1734, although he spent the last twelve years of his life overseas.

North and Grey was the first of his family to become a professional soldier, and he rose to the rank of Lieutenant General. His career faltered after the death of Queen Anne because he was known to be a Jacobite. After being arrested for his part in the Atterbury Plot, but released for lack of evidence, North and Grey took service in the army of King Philip V of Spain. He died in Madrid.