Australian Capital Territory (1991 pop. 276,468), 939 sq mi (2,432 sq km), SE Australia, an enclave within New South Wales, containing Canberra, capital of Australia. It was called the Federal Capital Territory until 1938. Most of the territory consists of an area formerly known as Yass-Canberra, which was ceded to the commonwealth by New South Wales in 1911. In 1915, New South Wales additionally ceded Jervis Bay, providing a potential port for Canberra. In 1988 the territory gained self-government with its own unicameral parliament, and Jervis Bay was separated from the territory. The federal government is the largest employer in the territory. Nearly all of the population lives in Canberra.