Sir Richard Fanshawe, 1st Baronet PC (June 1608 – 16 June 1666) was an English poet and translator. He was a diplomat and politician who sat in the House of Commons from 1661 to 1666. During the English Civil War he supported the Royalist cause and served King Charles II in battle and in exile.
Fanshawe was the fourth and youngest son of Sir Henry Fanshawe, of Ware Park, Hertfordshire and his wife Elizabeth Smythe, daughter of Thomas Smythe, of Ostenhanger Kent and was baptised at Ware on 12 June 1608. His father, who was Remembrancer of the Exchequer, died in 1616.
Fanshawe was admitted at Jesus College, Cambridge in November 1623 and was admitted to Inner Temple on 22 January 1626. He travelled on the Continent, and in 1635 was Secretary to the Embassy at the Court of Spain. In 1638, he was Chargé d'Affaires there.
When the Civil War broke out, Fanshawe sided with the King. He was Secretary of War to the Prince of Wales in 1644 and in 1648 had credentials for Spain, where he was sent to obtain money for the cause. From 1648 to 1650, he was Treasurer of the Navy under Prince Rupert. He was created a baronet on 2 September 1650, and soon afterwards was Secretary of State in Scotland to the young King Charles II. He was captured at the Battle of Worcester on 3 September 1651. He was knighted at Breda in April 1660, and made Latin Secretary and Master of Requests for King Charles when in Holland.