Home Postcodes by state SA 5125 Postcode 5125 5125 is the postcode for 3 localities in SA: Golden Grove, Golden Grove Village and Greenwith. Localities with postcode 5125Golden GroveSAGolden Grove VillageSAGreenwithSA Postcode 5125 State or territory South Australia (SA) Localities 3 Council area Tea Tree Gully Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5121 · Postcode 5126