William Norton, 2nd Baron Grantley (19 February 1742 – 12 November 1822) was a British politician who sat in the House of Commons from 1768 to 1789 when he succeeded to the peerage as Baron Grantley. Norton was the son of Fletcher Norton, 1st Baron Grantley, who was created a peer on 9 April 1782, from which time William Norton was styled 'the Honourable'. He was educated at St John's College, Cambridge. He was the third Englishman to be elected and the second to actually sit in Parliament, for the Scottish constituency of Wigtown Burghs.