The Shire of Augusta-Margaret River is a local government area in the south-west corner of the South West region of Western Australia, approximately 270 kilometres (168 mi) south of Perth. The shire covers an area of 2,243 square kilometres (866 sq mi) and had a population of over 14,000 at the 2016 Census, about half of whom live in the towns of Margaret River and Augusta.

Nearly half of Augusta-Margaret Rivers land area is state forest or national park. National parks include Scott National Park and Leeuwin-Naturaliste National Park. Other land uses include agriculture, especially dairy and beef cattle; viticulture; and tourism.