quality:correction
Western suburbs

The greater western suburbs encompasses the areas of Parramatta, the sixth largest business district in Australia, settled the same year as the harbour-side colony, Bankstown, Liverpool, Penrith, and Fairfield. Covering 5,800 km (2,200 sq mi) and having an estimated population as at 2017 of 2,288,554, western Sydney has the most multicultural suburbs in the country – Cabramatta has earned the nickname " Little Saigon " due to its Vietnamese population, Fairfield has been named "Little Assyria " for its predominant Assyrian population and Harris Park is known as " Little India " with its plurality of Indian and Hindu population. The population is predominantly of a working class background, with major employment in the heavy industries and vocational trade. Toongabbie is noted for being the third mainland settlement (after Sydney and Parramatta) set up after British colonisation began in 1788, although the site of the settlement is actually in the separate suburb of Old Toongabbie.

The western suburb of Prospect, in the City of Blacktown, is home to Raging Waters, a water park operated by Parques Reunidos. Auburn Botanic Gardens, a botanical garden in Auburn, attracts thousands of visitors each year, including many from outside Australia. The greater west also includes Sydney Olympic Park, a suburb created to host the 2000 Summer Olympics, and Sydney Motorsport Park, a circuit in Eastern Creek. Prospect Hill, a historically significant ridge in the west and the only area in Sydney with ancient volcanic activity, is also listed on the State Heritage Register.

To the northwest, Featherdale Wildlife Park, a zoo in Doonside, near Blacktown, is a major tourist attraction. Sydney Zoo, opened in 2019, is another prominent zoo situated in Bungaribee. Established in 1799, the Old Government House, a historic house museum and tourist spot in Parramatta, was included in the Australian National Heritage List on 1 August 2007 and World Heritage List in 2010 (as part of the 11 penal sites constituting the Australian Convict Sites), making it the only site in greater western Sydney to be featured in such lists. The house is Australia's oldest surviving public building.

Further to the southwest is the region of Macarthur and the city of Campbelltown, a significant population centre until the 1990s considered a region separate to Sydney proper. Macarthur Square, a shopping complex in Campbelltown, has become one of the largest shopping complexes in Sydney. The southwest also features Bankstown Reservoir, the oldest elevated reservoir constructed in reinforced concrete that is still in use and is listed on the State Heritage Register. The southwest is home to one of Sydney's oldest trees, the Bland Oak, which was planted in the 1840s by William Bland in Carramar.