Gunbar is in the Riverina district of south-western New South Wales in Australia, on a wide bend of the Mid-Western Highway between Gool…Gunbar is in the Riverina district of south-western New South Wales in Australia, on a wide bend of the Mid-Western Highway between Goolgowi and Hay. It is part of the Carrathool Shire local government area, administered from Goolgowi. At the 2006 census, Gunbar had a population of 97 people.