Home Postcode finder SA Woodchester Woodchester postcode SA Woodchester is a locality in South Australia covered by postcode 5255. Postcode 5255 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Woodchester business listing Be the first listing in Woodchester Common questionsWhat is the postcode for Woodchester?Woodchester, SA has the postcode 5255.What state is Woodchester in?Woodchester is in South Australia (SA).Does postcode 5255 cover more than one suburb?Yes. Postcode 5255 covers 19 localities, so the postcode alone does not identify Woodchester. Browse other postcodes in South Australia, or widen the search to every Australian postcode.