Francis George Godolphin D'Arcy D'Arcy-Osborne, 7th Duke of Leeds (21 May 1798 – 4 May 1859), styled Earl of Danby from birth until 1799 and Marquess of Carmarthen from 1799 until 1838, was a British peer and politician.

[3] As Marquess of Carmarthen, he held the parliamentary seat of Helston from 1826 to 1830 and on 2 July 1838, was summoned to the House of Lords in his father's barony of Osborne.

[9] The couple had no children and, upon the duke's death on 4 May 1859, his titles passed to other members of his family – the dukedom of Leeds went to his first cousin, the 2nd Lord Godolphin, whereas the baronies of Darcy de Knayth and Conyers went to his nephew, Sackville Lane-Fox, along with the Portuguese countship of Mértola.

In 1843, when Prince Alexander visited England and Scotland, the 7th Duke of Leeds composed his itinerary and hosted him at his Scottish estate Mar Lodge near Braemar.

[10] The 7th Duke of Leeds and his wife are buried in the Osborne family chapel at All Hallows Church, Harthill, South Yorkshire.