Thomas Belasyse, 1st Viscount Fauconberg (1577 – 18 April 1653), styled Baron Fauconberg between 1627 and 1643 and Sir Thomas Belasyse, 2nd Baronet between 1624 and 1627, was an English politician who sat in the House of Commons at various times between 1597 and 1624 and was raised to the peerage in 1627. He was an ardent supporter of the Royalist cause in the English Civil War.