Home Postcode finder SA Wistow Wistow postcode SA Wistow is a locality in South Australia covered by postcode 5251. Postcode 5251 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Wistow business listing Be the first listing in Wistow Common questionsWhat is the postcode for Wistow?Wistow, SA has the postcode 5251.What state is Wistow in?Wistow is in South Australia (SA).Does postcode 5251 cover more than one suburb?Yes. Postcode 5251 covers 6 localities, so the postcode alone does not identify Wistow. Browse other postcodes in South Australia, or widen the search to every Australian postcode.