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.^[1] 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.^[2][3]

The Shire is governed and administered by the Glenelg Shire Council; its seat of local government and administrative centre is located at the council headquarters in Portland, it also has service centres located in Casterton and Heywood. The Shire is named after the Glenelg River, a major geographical feature that meanders through the Shire.

At the 2001 Census, the population of the Shire was distributed in the following way: Portland: 49.7%, Casterton: 8.7%, Heywood: 6.3%, Dartmoor: 1.3%, Merino: 1.1%, Narrawong: 0.9% and Rural Balance: 32%.

Service industries, timber production, grazing and manufacturing are the Shire's main economic activities.^[4]

The formally recognised traditional owners for the area in which Glenelg Shire sits are the Gunditjmara People^[5] who are represented by the Gunditj Mirring Traditional Owners Aboriginal Corporation.^[6]

The 2021 census, the shire had a population of 20,152 up from 19,557 in the 2016 census^[10]

^ - Territory divided with another LGA

• List of localities (Victoria)