John Manners, 3rd Duke of Rutland KG PC was an English nobleman, the eldest son of John Manners, 2nd Duke of Rutland and Catherine Russell. Styled Marquess of Granby from 1711, he succeeded to the title in 1721, cutting short a brief career in the House of Commons, where he had represented Rutland as a Whig.

John Manners, 2nd Duke of Rutland KG, styled Lord Roos from 1679 to 1703 and Marquess of Granby from 1703 to 1711, was a British Whig politician who sat in the English and British House of Commons from 1701 until 1711, when he succeeded to the peerage as Duke of Rutland.