Sydney is the seat of state government as the capital of New South Wales (NSW), Australia’s most populous and economically important state.
Sydney is located on Australia’s southeastern coast at Port Jackson, a large, sheltered, deep-water inlet of the Tasman Sea (part of the South Pacific Ocean).
Sydney’s population density is among the lowest of any major world city, in part because suburban expansion began in earnest in the late 19th century after mechanized transportation became available.