Prestons is a suburb of Sydney, in the state of New South Wales, Australia 37 kilometres south-west of the Sydney central business district, in the local government area of the City of Liverpool. In the 1800s, this general area was known as "Cross Roads". The name appears to originate from 1821, when a notice published by John Oxley, the Surveyor General …Prestons is a suburb of Sydney, in the state of New South Wales, Australia 37 kilometres south-west of the Sydney central business district, in the local government area of the City of Liverpool. In the 1800s, this general area was known as "Cross Roads". The name appears to originate from 1821, when a notice published by John Oxley, the Surveyor General of New South Wales stated that "this Cross Road from Windsor ends in the new Bringelly Road". The name appears to have stuck, for as well as being a road to cross to the northern part of the Cumberland Basin, the Bringelly road literally made it a crossroad from east to west as well. The name was spelt as two words into the late 1800s, but the name continues in use today as the single word "Crossroads", being a locality within Casula, New South Wales and adjacent to modern Prestons, around the intersection of the Hume Highway/Campbelltown Road, and Camden Valley Way.