Sir Thomas Littleton, 3rd Baronet, often Thomas de Littleton, (3 April 1647 – 31 December 1709), of North Ockendon, Essex and Stoke St. Milborough, Shropshire, was an English lawyer and Whig politician who sat in the English and British House of Commons between 1689 and 1709. He served as Speaker of the House of Commons of England from 1698 to 1700, and as Treasurer of the Navy until his death. Upon his death, without issue in 1709 aged 62, the baronetcy expired, but his estate passed to his first cousin Mrs Elizabeth Meynell, the daughter of his uncle Edward Littleton.