Home Postcode finder SA Warren Warren postcode SA Warren is a locality in South Australia covered by postcode 5233. Postcode 5233 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Warren business listing Be the first listing in Warren Common questionsWhat is the postcode for Warren?Warren, SA has the postcode 5233.What state is Warren in?Warren is in South Australia (SA).Does postcode 5233 cover more than one suburb?Yes. Postcode 5233 covers 3 localities, so the postcode alone does not identify Warren. Browse other postcodes in South Australia, or widen the search to every Australian postcode.