George Thomas Clarke (13 November 1853 – 11 March 1925) was an Australian local government politician, accountant and estate agent. Clark served many years in local government, beginning in New Zealand when he was Town Clerk of South Dunedin and an alderman and mayor of St Kilda before coming to Sydney and was elected an Alderman of the City of Sydney, rising to become Lord Mayor for a single partial term from May to December 1912. Clarke also served a single term as Mayor of North Sydney (1922–1923), having served on both North Sydney Municipal Council and its predecessor the Borough of St Leonards.