Home Postcodes by state SA 5120 Postcode 5120 5120 is the postcode for 2 localities in SA: Buckland Park and Virginia. Localities with postcode 5120Buckland ParkSAVirginiaSA Postcode 5120 State or territory South Australia (SA) Localities 2 Council area Playford Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5118 · Postcode 5121