Home Postcode finder SA Hope Forest Hope Forest postcode SA Hope Forest is a locality in South Australia covered by postcode 5172. Postcode 5172 State or territory South Australia (SA) Region Adelaide Add a free Hope Forest business listing Be the first listing in Hope Forest Common questionsWhat is the postcode for Hope Forest?Hope Forest, SA has the postcode 5172.What state is Hope Forest in?Hope Forest is in South Australia (SA).Does postcode 5172 cover more than one suburb?Yes. Postcode 5172 covers 13 localities, so the postcode alone does not identify Hope Forest. Browse other postcodes in South Australia, or widen the search to every Australian postcode.