Culcairn is a town in the south-east Riverina region of New South Wales, Australia. Culcairn is located in the Greater Hume Shire Council local government area on the Olympic Highway between Albury and Wagga Wagga. The town is 514 kilometres (319 mi) south-west of the state capital, Sydney and at the 2006 census had a population of 1,120.
The town is an important supply centre for nearby towns and villages including, Morven, Gerogery, Henty, Walla Walla and Pleasant Hills. Billabong Creek runs along the southern edge of town, lending its name to the local high school.