Home Postcode finder SA Bower Bower postcode SA Bower is a locality in South Australia covered by postcode 5374. Postcode 5374 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Bower business listing Be the first listing in Bower Common questionsWhat is the postcode for Bower?Bower, SA has the postcode 5374.What state is Bower in?Bower is in South Australia (SA).Does postcode 5374 cover more than one suburb?Yes. Postcode 5374 covers 15 localities, so the postcode alone does not identify Bower. Browse other postcodes in South Australia, or widen the search to every Australian postcode.