Brewarrina Shire is a local government area in the Orana region of New South Wales, Australia. The Shire is located adjacent to the Darling River, which is known as the Barwon River upstream from Bourke; and located adjacent to the Kamilaroi Highway. The northern boundary of the Shire is located adjacent to the border between New South Wales and Queensland. The Shire is a wool and cotton growing area.

Barwon is an electoral district of the Legislative Assembly in the Australian state of New South Wales. It is represented by Roy Butler, a former member of the Shooters, Fishers and Farmers Party who is now an independent MP.