Home Postcode finder SA North West Bend North West Bend postcode SA North West Bend is a locality in South Australia covered by postcode 5320. Postcode 5320 State or territory South Australia (SA) Region SA Outer Suburbs Add a free North West Bend business listing Be the first listing in North West Bend Common questionsWhat is the postcode for North West Bend?North West Bend, SA has the postcode 5320.What state is North West Bend in?North West Bend is in South Australia (SA).Does postcode 5320 cover more than one suburb?Yes. Postcode 5320 covers 13 localities, so the postcode alone does not identify North West Bend. Browse other postcodes in South Australia, or widen the search to every Australian postcode.