Thomas Robinson, 1st Baron Grantham

Thomas Robinson, 1st Baron Grantham, KB, PC (c. 1695 – 30 September, 1770), English diplomatist and politician, was a younger son of Sir William Robinson, Bt. (1655–1736) of Newby, Yorkshire, who was member of parliament for York from 1697 to 1722.

Having been a scholar and minor fellow of Trinity College, Cambridge, Thomas Robinson gained his earliest diplomatic experience in Paris and then went to Vienna, where he was English ambassador from 1730 to 1748. During 1741 he sought to make peace between the empress Maria Theresa and Frederick the Great, but in vain, and in 1748 he represented his country at the Congress of Aix-la-Chapelle. He was made a Knight Companion of the Bath in 1742.

Returning to England he sat in parliament for Christchurch from 1749 to 1761. In 1750, he was appointed to the Privy Council. In 1754 Robinson was appointed Secretary of State for the Southern Department and Leader of the House of Commons by the prime minister, the Duke of Newcastle, and it was on this occasion that Pitt made the famous remark to Fox, "the duke might as well have sent us his jackboot to lead us." In November 1755 he resigned, and in April 1761 he was created Baron Grantham. He was Master of the Great Wardrobe 1749–1754 and again 1755–1760, and was joint Postmaster-General in 1765 and 1766. He died in London on 30 September 1770.

He married Frances, daughter of Thomas Worsley of Hovingham, on 13 July, 1737, and had two sons and six daughters. He was succeeded in the peerage by his eldest son, Thomas.