Home Postcode finder SA Gawler South Gawler South postcode SA Gawler South is a locality in South Australia covered by postcode 5118. Postcode 5118 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Gawler South business listing Be the first listing in Gawler South Common questionsWhat is the postcode for Gawler South?Gawler South, SA has the postcode 5118.What state is Gawler South in?Gawler South is in South Australia (SA).Does postcode 5118 cover more than one suburb?Yes. Postcode 5118 covers 16 localities, so the postcode alone does not identify Gawler South. Browse other postcodes in South Australia, or widen the search to every Australian postcode.