The Limestone Coast is a South Australian Government Region which consists of land within the following local government areas located in the south east of the state: the City of Mount Gambier and the District Councils of Grant, Kingston, Robe, Tatiara and Naracoorte Lucindale and the Wattle Range Council, and the extent of "coastal waters" up to three nautical miles seaward of the low water mark between the border with Victoria in the east and the northern boundary of the Kingston District Council in the north-west.

From the Victoria border to the Younghusband Peninsula this area has been settled since colonisation by mainly European settlers in the 1840s, displacing an indigenous population that had resided in the region for thousands of years.

Towns include Bordertown, Keith, Millicent, Mount Gambier, Penola, and Naracoorte and the coastal resorts of Beachport, Kingston SE and Robe.

The plains are lined by rows of low sandhills parallel to the coast, created at times when the coastline was at that level.

Therefore, most indigenous wildlife has also disappeared or been severely reduced in number with introduced species of animals an ongoing threat to that which remains.