Middleton () is a town in South Australia on the eastern end of the south coast of the Fleurieu Peninsula. It is situated between the towns of Port Elliot and Goolwa. As of 2006 its population was 1337. Middleton is a holiday and tourist destination. Some Southern Right Whales calve and mate in the waters off of Middleton's beaches. Middleton is part of the Alexandrina Council area. It is in the state electorate of Finniss and the federal Division of Mayo.
