Home Postcode finder SA Hawthorn Hawthorn postcode SA Hawthorn is a locality in South Australia covered by postcode 5062. Postcode 5062 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Hawthorn business listing Be the first listing in Hawthorn Common questionsWhat is the postcode for Hawthorn?Hawthorn, SA has the postcode 5062.What state is Hawthorn in?Hawthorn is in South Australia (SA).Does postcode 5062 cover more than one suburb?Yes. Postcode 5062 covers 11 localities, so the postcode alone does not identify Hawthorn. Browse other postcodes in South Australia, or widen the search to every Australian postcode.