The Sydney central business district (CBD and populary refereed to as the City) is a suburb and the main commercial centre of Sydney, New South Wales, Australia. It extends southwards for about 3 km (2 mi) from Circular Quay in the north to Central railway station in the south. Its east-west axis runs from a chain of parkand that includes Hyde Park, The Domain, Royal Botanic Gardens and Farm Cove on Sydney Harbour in the east; to Darling harbour and the western Distributor in the west. at the 2011 Australian Census the suburb recorded a population of 14,308.

The Sydney central business district is also sometimes used loosely to encompass the surrounding suburbs such as Pyrmont, Haymarket, Ultimo and Woolloomooloo.