Francis Osborne, 5th Duke of Leeds

His Grace The Duke of Leeds KG PC
Portrait by Benjamin West, circa 1769
Secretary of State for Foreign Affairs
In office 23 December 1783 – May 1791
Monarch	George III
Prime Minister	The Right Hon. William Pitt
Preceded by	The Earl Temple
Succeeded by	The Lord Grenville
Leader of the House of Lords
In office 1789–1790
Preceded by	The Lord Sydney
Succeeded by	The Lord Grenville
Personal details
Born	29 January 1751 (1751-01-29)
Died	31 January 1799(1799-01-31) (aged 48) London, England, Great Britain
Resting place	All Hallows Church, Harthill, South Yorkshire
Nationality	British
Political party	Tory
Spouses	Lady Amelia Darcy ​ ​ (m. 1773; div. 1779)​ Catherine Anguish ​ ​ (m. 1788)​
Children	George Osborne, 6th Duke of Leeds Mary Pelham, Countess of Chichester Francis Osborne, 1st Baron Godolphin Lord Sidney Osborne Lady Catherine Whyte-Melville
Parent(s)	Thomas Osborne, 4th Duke of Leeds Lady Mary Godolphin
Alma mater	Christ Church, Oxford

Francis Godolphin Osborne, 5th Duke of Leeds, KG, PC (29 January 1751 – 31 January 1799), styled Marquess of Carmarthen until 1789, was a British politician. He notably served as Foreign Secretary under William Pitt the Younger from 1783 to 1791. He also was Governor of Scilly. In 1790, he was made a Knight of the Order of the Garter. As a statesman, he is generally regarded as a failure, and his deep hostility to the newly independent United States damaged relations between the two countries.