Billiatt is a locality in the Australian state of South Australia located in the south-east of the state in the Murray Mallee region about 168 kilometres (104 mi) north-east of the Adelaide city centre. Its boundaries were created in September 2000 for the “long established local name”. Its name is derived from the Billiatt Conservation Park and the Hundred of Billiatt. The principal land use within the locality is conservation with the majority of its land area being occupied by the Billiatt Wilderness Protection Area. Billiatt is located within the federal Division of Barker and the state electoral district of Chaffey and the local government area of the District Council of Loxton Waikerie.