Circular Quay is a CityRail station located in Sydney, Australia and is an integral part of the City Circle. It was opened on 20 January 1956.

The station is beside the Circular Quay ferry terminals from which services operate to a number of locations around Sydney Harbour. The area is also the terminus for a number of bus services.

Circular Quay is the nearest railway station to the Sydney Opera House and The Rocks area of Sydney.

Trains from "the Quay" go to East Hills, South, Bankstown and Inner West lines. The station is manned from first to last train, and is fully accessible to wheelchairs.

It is the only station in the City Circle to not contain any underground platforms, as it is an elevated station located underneath the Cahill Expressway . It has been proposed in the past to move the station underground, but this has not occurred. It is the newest station on the City Circle.

The station provides spectacular views of Sydney Harbour and the Sydney Opera House.