Thomas Machen (c. 1541–18 October 1614) was a mercer who was mayor of Gloucester three times and sat in the House of Commons in 1614. Machen was the son of Henry Machen (d. 1566) and his wife, whose surname may have been Baugh or Brayh. He was possibly the Thomas Machin who in 1562 supplicated for his MA at Oxford University, where three of his sons were later educated. By 1566 he had married Christian Baston (c.1546–1615); they had seven sons and six daughters.