Home Postcodes by state SA 5126 Postcode 5126 5126 is the postcode for 3 localities in SA: Fairview Park, Surrey Downs and Yatala Vale. Localities with postcode 5126Fairview ParkSASurrey DownsSAYatala ValeSA Postcode 5126 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 5125 · Postcode 5127