John Manners, Marquess of Granby, English general and politician, Lord Lieutenant of Derbyshire (b. 1721)
Lieutenant-General John Manners, Marquess of Granby, (2 January 1721 – 18 October 1770) was a British soldier and the eldest son of the 3rd Duke of Rutland. As he did not outlive his father and inherit the dukedom, he was known by his father's subsidiary title, Marquess of Granby.

Manners served in the Seven Years' War as overall commander of the British troops on the battlefield and was subsequently rewarded with the post of Commander-in-Chief of the Forces. He was popular with his troops and many public houses are still named after him today.