Home Postcodes by state SA 5116 Postcode 5116 5116 is the postcode for 5 localities in SA: Evanston, Evanston Gardens, Evanston Park, Evanston South and Hillier. Localities with postcode 5116EvanstonSAEvanston GardensSAEvanston ParkSAEvanston SouthSAHillierSA Postcode 5116 State or territory South Australia (SA) Localities 5 Council area Gawler Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5115 · Postcode 5117