Home Postcodes by state SA 5127 Postcode 5127 5127 is the postcode for Wynn Vale, SA. Localities with postcode 5127Wynn ValeSA Postcode 5127 State or territory South Australia (SA) Localities 1 Council area Tea Tree Gully Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5126 · Postcode 5131