The Outback Communities Authority (OCA) is a statutory authority in South Australia (SA) created under the Outback Communities Act 2009. It has been established to "manage the provision of public services and facilities to outback communities" which are widely dispersed across the Pastoral Unincorporated Area which covers almost 60% of South Australia's land area. The authority has its seat at both Port Augusta which is located outside the unincorporated area and at Andamooka. The authority serves an area of 624,339 square kilometres, slightly smaller than France. The area has a population of 3,750, of whom 639 are Indigenous Australians, and includes several large pastoral leases and mining operations.

Andamooka is a town approximately 600 km north of Adelaide in the Far North of South Australia on the lands of the Kokatha people. Andamooka is the largest town administered by the Outback Communities Authority instead of a local government area. It is in the state electoral district of Giles and the federal Division of Grey.