Circular Quay is a locality in the City of Sydney, Australia, between Bennelong Point and The Rocks. Formerly known as Sydney Cove, it was the site of the initial landing of the First Fleet in Port Jackson.

It is a major Sydney transport hub, with a large ferry, rail and bus interchange. The Cahill Expressway is a prominent feature of the quay, running from the east, over the elevated railway station to joining the Sydney Harbour Bridge in the west.

Circular Quay is a focal point for many community celebrations, for both its historic significance as the birthplace of the Australian nation, and for its proximity to the Sydney icons of the Sydney Opera House and the Sydney Harbour Bridge. It is one of the main congregation points for the New Years Eve and Australia Day fireworks displays.

Circular Quay is also the home of Sydney's Museum of Contemporary Art and soon the City Library, in the historic Customs House .