Coleambally is a small town in the Riverina of New South Wales, Australia, in Murrumbidgee Local Government Area. Coleambally is one of the newest towns in the state of New South Wales, officially opened in June 1968, with the Post Office opening on 1 April 1970. Designed to act as the centre for the surrounding Coleambally Irrigation Area, at the 2016 census, Coleambally had a population of 1331. Its name is Aboriginal, probably meaning a swift in flight.