The Barwon South West is an economic rural region located in the southwestern part of Victoria, Australia. The Barwon South West region stretches from the tip of the Queenscliff Heads to the border of South Australia. It is home to Victoria’s largest provincial centre, Geelong and the major centres of Aireys Inlet, Apollo Bay, Camperdown, Colac, Hamilton, Lorne, Port Campbell, Port Fairy, Portland, Torquay and Warrnambool. It draws its name from the Barwon River and the geographic location of the region in the state of Victoria.

The Shire of Glenelg is a local government area in the Barwon South West region of Victoria, Australia, located in the south-western part of the state. It covers an area of 6,219 square kilometres (2,401 sq mi) and in June 2018 had a population of 19,665. It includes the towns of Casterton, Heywood, Merino and Portland. Although a shire of the same name existed before the amalgamations of the mid-1990s, the current Shire was formed in 1994 from the amalgamation of the former Shire of Glenelg with the Shire of Heywood and City of Portland.