Sir Richard Newdigate, 1st Baronet (17 September 1602 – 14 October 1678) was an English judge, landowner and politician who sat in the House of Commons from 1660.
Richard Newdigate was a younger son of Sir John Newdigate (5 March 1571 – 28 March 1610) of Arbury Hall, Chilvers Coton, Warwickshire, and his wife Anne Fitton (baptized 6 October 1574 – 11 July 1618), the elder daughter of Sir Edward Fitton, baronet, of Gawsworth, Cheshire, by Alice Holcroft (d.1627). He was the grandson of John Newdigate (1541 – 22 February 1592), esquire, of Harefield, Middlesex, and Martha Cave (24 February 1546 – 22 November 1575), the daughter and co-heir of Anthony Cave.
Matriculating at Trinity College, Oxford, on 6 November 1618, he left the university without a degree, and entered in 1620 Gray's Inn, where he was called to the bar in 1628, elected an ancient in 1645, and a bencher in 1649. He was High Steward of the Royal Town of Sutton Coldfield from 1646 until his death.
Newdigate was counsel with William Prynne and John Bradshaw on behalf of the state in the proceedings taken against Connor Maguire, 2nd Baron of Enniskillen, and other Irish rebels in 1644–5. He was also one of the counsel for the eleven members impeached by Thomas Fairfax in June 1647. On 9 February 1653–4 he was called to the degree of serjeant-at-law, and on 31 May following was made a justice of the upper bench, in which capacity he was placed on the special commission for the trial of the Yorkshire insurgents on 5 April 1655. He declined to serve, on the ground that levying war against the Lord Protector Oliver Cromwell was not within the statute of treason; and in consequence was removed from his place (3 May), and resumed practice at the bar. He was, however, reinstated before 26 June 1657, when he attended, as justice of the upper bench, the ceremony of the reinvestiture of the Protector in Westminster Hall.