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.

Duke of Rutland is a title in the Peerage of England, named after Rutland, a county in the East Midlands of England. Earldoms named after Rutland have been created three times; the ninth earl of the third creation was made duke in 1703, in whose family's line the title continues. The heir apparent to the dukedom has the privilege of using the courtesy title of Marquess of Granby.