Sussex Street is a street in the central business district of Sydney in New South Wales, Australia. It runs north-south along the western side of the city, between Hickson Road and Hay Street. It is in the local government area of the City of Sydney. The street is 1.7 kilometres (1.1 mi) long. It was named in honour of Prince Augustus Frederick, Duke of Sussex, the sixth son of King George III. The street is home to the state headquarters of the Australian Labor Party (ALP) and "Sussex St" is widely used as a metonym for the ALP in general and for ALP headquarters in particular.