Home Postcode finder SA Gum Creek Gum Creek postcode SA Gum Creek is a locality in South Australia covered by postcode 5417. Postcode 5417 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Gum Creek business listing Be the first listing in Gum Creek Common questionsWhat is the postcode for Gum Creek?Gum Creek, SA has the postcode 5417.What state is Gum Creek in?Gum Creek is in South Australia (SA).Does postcode 5417 cover more than one suburb?Yes. Postcode 5417 covers 10 localities, so the postcode alone does not identify Gum Creek. Browse other postcodes in South Australia, or widen the search to every Australian postcode.