Home Postcode finder SA Thorngate Thorngate postcode SA Thorngate is a locality in South Australia covered by postcode 5082. Postcode 5082 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Thorngate business listing Be the first listing in Thorngate Common questionsWhat is the postcode for Thorngate?Thorngate, SA has the postcode 5082.What state is Thorngate in?Thorngate is in South Australia (SA).Does postcode 5082 cover more than one suburb?Yes. Postcode 5082 covers 6 localities, so the postcode alone does not identify Thorngate. Browse other postcodes in South Australia, or widen the search to every Australian postcode.