Hawker is a town and a locality in the Flinders Ranges area of South Australia, 365 kilometres (227 mi) north of Adelaide. It is in the Flinders Ranges Council, the state Electoral district of Stuart and the federal Division of Grey.

The Flinders Ranges are the largest mountain ranges in South Australia, which starts about 200 km (125 mi) north of Adelaide. The ranges stretch for over 430 km (265 mi) from Port Pirie to Lake Callabonna.