South Australia is a state in the southern central part of Australia. It covers some of the most arid parts of the continent. With a total land area of 983,482 square kilometers, it is the fourth largest of Australia's states and territories.
South Australia shares borders with all of the other mainland states, and with the Northern Territory; it is bordered to the west by Western Australia, to the north by the Northern Territory, to the north-east by Queensland, to the east by New South Wales, to the south-east by Victoria, and to the south by the Great Australian Bight and the Indian Ocean. With over 1.6 million people, the state comprises less than 8% of the Australian population and ranks fifth in population among the six states and two territories. The majority of its people reside in the state capital, Adelaide.