John Drummond, 1st Earl of Melfort, styled Duke of Melfort in the Jacobite peerage (8 August 1650 - 25 January 1715), was a Scottish politician and close advisor to James II. A Catholic convert, Melfort and his brother the Earl of Perth consistently urged James not to compromise with his opponents, contributing to his increasing isolation and ultimate deposition in the 1688 Glorious Revolution.