Home Postcodes by state SA 5039 Postcode 5039 5039 is the postcode for 3 localities in SA: Clarence Gardens, Edwardstown and Melrose Park. Localities with postcode 5039Clarence GardensSAEdwardstownSAMelrose ParkSA Postcode 5039 State or territory South Australia (SA) Localities 3 Council area Mitcham; Marion Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5038 · Postcode 5040