Thomas Scawen (died 1774) was a British politician who sat in the House of Commons from 1727 to 1741. Scawen was the son of Sir Thomas Scawen and his wife Martha Wessell, the daughter of Abraham Wessell, a London merchant. In 1722 he inherited the property of his uncle Sir William Scawen which included Carshalton Park. He married Tryphena Russell, daughter of of Maidwell, Northamptonshire on 8 June 1725. Scawen died on 11 February 1774. His daughter Tryphena married Henry Bathurst, 2nd Earl Bathurst.