The Shire of Peppermint Grove is a local government area in Perth, Western Australia, 12 kilometres (7.5 mi) southwest of the Perth central business district.

At 1.1 km2 (0.42 sq mi),[2] it is the smallest local government area in Australia; it contains only the eponymous suburb, Peppermint Grove.

[5] The shire was located on the Perth–Fremantle road (now Stirling Highway) and had received assistance in its maintenance in the past.

Community opposition and threats of legal action from Peppermint Grove and other local governments[7] led to the collapse of the reform process.

[10] In 2019, the Shire lost a six year legal battle with a resident who opposed the local government's heritage classification of his property.