Bankstown is a suburb of Sydney, in the state of New South Wales, Australia. It is located 19 kilometres south-west of the Sydney central business district and is part of the Canterbury-Bankstown region. Bankstown is the administrative centre of the City of Canterbury-Bankstown, having previously been the administrative centre of the City of Bankstown prior to the 2016. It is the most populous suburb within the City of Canterbury-Bankstown.

Sydney is the capital city of the state of New South Wales and the most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Sydney Harbour and extends about 80 km from the Pacific Ocean in the east to the Blue Mountains in the west, and about 80 km from the Ku-ring-gai Chase National Park and the Hawkesbury River in the north and north-west, to the Royal National Park and Macarthur in the south and south-west. Greater Sydney consists of 658 suburbs, spread across 33 local government areas. Residents of the city are colloquially known as "Sydneysiders". The estimated population in June 2023 was 5,450,496, which is about 66% of the state's population. The city's nicknames include the "Emerald City" and the "Harbour City".