O'Sullivan Beach is a suburb of Adelaide, South
Australia and is about 14227 kms west-southwest of
SA's capital city of Adelaide.
O'Sullivan Beach is a seaside suburb in the
southern Adelaide metropolitan area, within the
City of Onkaparinga. O'Sullivan Beach has a
unique postcode of 5166. The O'Sullivan Beach
suburb was developed to provide housing to
accompany the development of the Lonsdale
industrial development and the adjacent Port
Stanvac oil refinery facility.