Hay is a town in the western Riverina region of south-western NSW, and the centre of a productive agricultural district on the wide, treeless Hay Plains. It is located approximately 725km west of Sydney, at the junction of the Sturt, Cobb and Mid-Western Highways. The township itself is built beside the Murrumbidgee River, part of the Murray-Darling river system, which is Australia's largest. Hay has a number of heritage-listed buildings, including: Hay Gaol Museum, Hay Post Office, Bishops Lodge, Hay railway station.