Laffer is a locality in the Australian state of South Australia located in the state’s south-east about 199 kilometres (124 mi) south-east of the state capital of Adelaide and about 57 kilometres (35 mi) west of the municipal seat in Bordertown.

[3] Its name is derived from the cadastral unit of the Hundred of Laffer which it occupies along with the locality of Mount Charles.

This includes land at the locality’s southern boundary which is occupied by the protected area known as the Gum Lagoon Conservation Park.

[9][1] The 2016 Australian census which was conducted in August 2016 reports that Laffer had a population of 48 people.

[2] Laffer is located within the federal division of Barker, the state electoral district of MacKillop and the local government area of the Tatiara District Council.