Waterloo is an inner-city suburb of Sydney, New South Wales, located 4 kilometres south of the Sydney central business district (CBD) and is part of the local government area of the City of Sydney.
Waterloo is serviced by State Transit Authority Sydney Buses routes to the Sydney CBD. Green Square underground railway station, on the Airport line of the Sydney Trains network, is located in the south-west corner of the suburb. Redfern railway station is located close to the north-west corner of the suburb.
According to the 2011 census, Waterloo has a population of 10,657 people, 64.3% of the population was born overseas. English was primarily spoken at home by 47.7% of the population, with the most important other languages being Chinese (10.3%), Russian (5.2%) and Korean (2.5%). 80.8% of the population lived in units, significantly different from the rest of Australia (where only 13.6% of the population are unit dwellers). Furthermore, 74.5% of dwellings were rented, compared to 29.6% in Australia as a whole.