The Municipality of Balmain was a local government area of Sydney, New South Wales, Australia. The municipality was proclaimed in February 1860 and, with an area of 3.8 square kilometres, covered the entire peninsula of Balmain north of Callan Park and Foucart Street, including the present suburbs of Balmain, Balmain East, Birchgrove and Rozelle. The council was amalgamated with the municipalities of Leichhardt and Annandale to the south with the passing of the Local Government (Areas) Act 1948.