Home Postcode finder SA Big Bend Big Bend postcode SA Big Bend is a locality in South Australia covered by postcode 5238. Postcode 5238 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Big Bend business listing Be the first listing in Big Bend Common questionsWhat is the postcode for Big Bend?Big Bend, SA has the postcode 5238.What state is Big Bend in?Big Bend is in South Australia (SA).Does postcode 5238 cover more than one suburb?Yes. Postcode 5238 covers 31 localities, so the postcode alone does not identify Big Bend. Browse other postcodes in South Australia, or widen the search to every Australian postcode.