Home Postcodes by state SA 5168 Postcode 5168 5168 is the postcode for 3 localities in SA: Noarlunga Downs, Old Noarlunga and Noarlunga Centre. Localities with postcode 5168Noarlunga CentreSANoarlunga DownsSAOld NoarlungaSA Postcode 5168 State or territory South Australia (SA) Localities 3 Council area Onkaparinga Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5167 · Postcode 5169