Baron Granville was a title that was created twice in the Peerage of England.
The first creation came on 20 April 1661 when John Granville, 1st Earl of Bath was made Baron Granville of Kilkhampton and Biddeford.
He was made Viscount Granville and Earl of Bath at the same time.
The second creation came on 13 March 1703 when the Honourable John Granville was made Baron Granville of Potheridge.
He was a younger son of the first Earl of Bath.