The Shire of Nannup is a local government area in the South West region of Western Australia, approximately 280 kilometres (174 mi) south of the state capital, Perth and 60 kilometres (37 mi) southeast of the coastal resort town of Busselton.

Its seat of government is the town of Nannup, where about half of the Shire's population reside.

The Shire has a land area of 2,935 square kilometres (1,133 sq mi), about 85% of which is covered in hardwood jarrah, karri and marri forests, while the southern coastline is mostly within the D'Entrecasteaux National Park.

[2] The Shire of Nannup is located on the traditional land of the Bibulman and Wardandi people of the Noongar nation.

The towns and localities of the Shire of Nannup with population and size figures based on the most recent Australian census:[6][7] As of 2023, 88 places are heritage-listed in the Shire of Nannup,[23] of which three are on the State Register of Heritage Places.