Darlington is a small, inner-city suburb of Sydney, New South Wales, Australia. Darlington is located about three kilometres south of the Sydney central business district and is part of the local government area of the City of Sydney. At the time of its incorporation in 1864, it had the distinction of being the smallest municipality in the Sydney metropolitan area, at a mere 44 acres. Darlington is bordered by City Road, Cleveland Street, Golden Grove Street, Wilson Street and Abercrombie Street.

The City of Sydney is the local government area covering the Sydney central business district and surrounding inner city suburbs of the greater metropolitan area of Sydney, New South Wales, Australia. Established by Act of Parliament in 1842, the City of Sydney is the oldest, and the oldest-surviving, local government authority in New South Wales, and the second-oldest in Australia, with only the City of Adelaide being older by two years.