Austral is a suburb of Sydney, in the state of New South Wales, Australia. It is 42 kilometres south-west of the Sydney central business district, in the local government area of the City of Liverpool.
It is bounded to the west by waterway Kemps Creek, to the east by a Sydney Water supply channel, to the north by a straight division, and to the south by Bringelly Road. Bonds Creek flows southeast-northwest through the suburb, and confluences with Kemps Creek near Fifteenth Avenue. It is of note in its design, its streets laid out in a grid pattern, and all horizontal ones named 'Avenue', in numbers from south to north increasing.