Nullarbor National Park is a protected area in the Australian state of South Australia located in the locality of Nullarbor about 887 km west of the state capital of Adelaide and about 400 km west of Ceduna. Founded in 1979, its extent was reduced in 2013 from 5781.27 km2 to 323.10 km2 by the proclamation of the Nullarbor Wilderness Protection Area. As of 2013, it is bounded to the west by the Western Australia - South Australian state border, the north by the Nullarbor Regional Reserve and to the east and the south by the Nullarbor Wilderness Protection Area. It is classified as an IUCN Category VI protected area. In 1980, it was listed on the now-defunct Register of the National Estate.