The Shire of Katanning is a local government area in the Great Southern region of Western Australia, about 170 kilometres (106 mi) north of Albany and about 290 kilometres (180 mi) southeast of the state capital, Perth. The Shire covers an area of 1,518 square kilometres (586 sq mi), and its seat of government is the town of Katanning.

The Great Southern region is one of the nine regions of Western Australia, as defined by the Regional Development Commissions Act 1993, for the purposes of economic development. It is a section of the larger south coast of Western Australia and neighbouring agricultural regions.