Sir John Fitzjames (31 December 1619 – 21 June 1670) was an English politician who sat in the House of Commons at various times between 1654 and 1670. He was the son of Leweston Fitzjames of Leweston, Dorset and matriculated at Magdalen College, Oxford, on 4 March 1636, aged 16. He was the brother of Thomas Fitzjames and Henry Fitzjames. He succeeded his father to the Leweston estate in 1638.