Pitt Street is a major street in the central business district of Sydney in New South Wales, Australia. The street runs through the entire city centre from Circular Quay in the north to Waterloo, although today's street is in two disjointed sections after a substantial stretch of it was removed to make way for Sydney's Central Railway Station. Pitt Street is well known for the pedestrian only retail centre of Pitt Street Mall, a section of the street which runs from Market Street to King Street.
The street is one way (southbound only) from Railway Square to Pitt Street Mall and (northbound only) from Circular Quay to Pitt Street Mall, while Pitt Street Mall is for pedestrians only. The northern section of the street, from Railway Square to Circular Quay, is dominated by retail and commercial office space, while the southern section, from Railway Square through Redfern to Waterloo, is predominantly residential with some light commercial and industrial use.
Pitt Street was originally named Pitt Row, and is one of the earliest named streets in Sydney. While it is usually assumed to be named after British Prime Minister William Pitt who was Prime Minister around the time of the establishment of Sydney, an alternative explanation is that it was initially so-named because it terminated close to the tanks or "pits" excavated in 1791–1792 in the Tank Stream, the original source of fresh water for the colony. In 1842, Pitt Street was continued south through to Waterloo with the subdivision of Redfern. In 1853, Pitt Street was extended north from Hunter Street to Circular Quay.
The Circular Quay, Central Station Colonnade via Pitt and Castlereagh Streets tram line was an extremely busy service for passengers transferring from suburban trains at Central, particularly prior to the opening of the city underground railway lines in 1926. Trams operated from Central station running northbound along Pitt Street to Circular Quay forming a loop (running southbound down Castlereagh Street) and back into Central station. These tracks were also used as the city route for some eastern and south-western routes during busy periods. The line closed on 28 September 1957, replaced by a bus service. The line made use of the sandstone viaduct onto the colonnade at Central station, which has been reused by the Dulwich Hill Line as part of Sydney's modern light rail network since 1997.