Home Postcodes by state SA 5263 Postcode 5263 5263 is the postcode for Coonawarra, SA. Localities with postcode 5263CoonawarraSA Postcode 5263 State or territory South Australia (SA) Localities 1 Council area Wattle Range Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5262 · Postcode 5264