Wynyard railway station is a heritage-listed underground commuter rail station located in the north-west precinct of the Sydney central business district, in New South Wales, Australia. The station opened on 28 February 1932 to coincide with the opening of the Sydney Harbour Bridge.

The Sydney central business district (CBD) is the historical and main commercial centre of Sydney. The CBD is Sydney's city centre, or Sydney City, and the two terms are used interchangeably. Colloquially, the CBD or city centre is often referred to simply as "Town" or "the City". The Sydney city centre extends southwards for about 3 km (2 mi) from Sydney Cove, the point of first European settlement in which the Sydney region was initially established.