Thomas Lancelot (Tom) Lewis AO (23 January 1922 – 25 April 2016) was a New South Wales politician. He served as Premier of New South Wales and Minister in the cabinets of Sir Robert Askin and Sir Eric Willis. He became Premier following Askin's retirement from politics and held the position until he was replaced by Willis in a party vote. Lewis was first elected to the New South Wales Legislative Assembly for the Electoral district of Wollondilly for the Liberal Party of Australia from 1957 until his resignation in 1978.