John Charles George Savile, 4th Earl of Mexborough (4 June 1810 – 17 August 1899), styled Viscount Pollington between 1830 and 1860, was a British peer and Tory politician. He impressed his friends enough to be twice fictionalised, and at his death he was the last surviving person to have been elected a Member of the House of Commons before the passing of the Reform Act in 1832.