Millicent is a town in the Australian state of South Australia located about 399 kilometres (248 mi) south-east of the state capital of Adelaide and about 50 kilometres (31 mi) north of the regional centre of Mount Gambier. In the 2011 census, the population was 5,024.

Mount Gambier is the second most populated city in South Australia, with an estimated urban population of 33,233 as of 2021. The city is located on the slopes of Mount Gambier, a volcano in the south east of the state, about 450 kilometres (280 mi) south-east of the capital Adelaide and just 17 kilometres (11 mi) from the Victorian border. The traditional owners of the area are the Bungandidj people. Mount Gambier is the most important settlement in the Limestone Coast region and the seat of government for both the City of Mount Gambier and the District Council of Grant.