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.