| City Circle | |||
|---|---|---|---|
 Town Hall station, a major interchange and one of the busiest stations on the City Circle | |||
| Overview | |||
| Owner | Transport Asset Holding Entity | ||
| Termini | Central | ||
| Stations | 6 | ||
| Service | |||
| Services | T2 Leppington & Inner West Line T3 Liverpool & Inner West Line T8 Airport & South Line | ||
| Operator(s) | Sydney Trains | ||
| History | |||
| Opened | 20 December 1926 (first segment) 22 January 1956 (entire loop) | ||
| Technical | |||
| Line length | 6 km (3.7 mi) | ||
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge | ||
| |||
The City Circle is a mostly-underground railway line located in the Sydney central business district and Haymarket, in New South Wales, Australia, that forms the core of Sydney's passenger rail network. The lines are owned by the Transport Asset Holding Entity, a State government agency, and operated under Transport for NSW's Sydney Trains brand. Despite its name, the City Circle is of a horseshoe shape, with trains operating in a U-shaped pattern. The constituent stations of the Circle are (clockwise): Central, Town Hall, Wynyard, Circular Quay, St James, Museum and back to Central.