Home Postcode finder SA Forest Range Forest Range postcode SA Forest Range is a locality in South Australia covered by postcode 5139. Postcode 5139 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Forest Range business listing Be the first listing in Forest Range Common questionsWhat is the postcode for Forest Range?Forest Range, SA has the postcode 5139.What state is Forest Range in?Forest Range is in South Australia (SA).Does postcode 5139 cover more than one suburb?No. Postcode 5139 covers Forest Range only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in South Australia, or widen the search to every Australian postcode.