Haymarket is an inner city suburb of Sydney, New South Wales, Australia. It is located at the southern end of the Sydney central business district in the local government area of the City of Sydney. Haymarket includes much of Sydney's Chinatown, Thaitown and Railway Square localities. Haymarket is adjacent to Darling Harbour and is surrounded by the suburbs of Ultimo, Chippendale, Surry Hills and the Sydney CBD.

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.