Home Postcodes by state SA 5157 Postcode 5157 5157 is the postcode for 8 localities in SA: Ashbourne, Bull Creek, Cherry Gardens, Clarendon, Coromandel East, Dorset Vale and 2 more. Localities with postcode 5157AshbourneSABull CreekSACherry GardensSAClarendonSACoromandel EastSADorset ValeSAKangarillaSAMcharg CreekSA Postcode 5157 State or territory South Australia (SA) Localities 8 Council area Alexandrina; Mainly Mount Barker, partly Alexandrina; Onkaparinga Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5156 · Postcode 5158