Home Postcode finder SA Wellington East Wellington East postcode SA Wellington East is a locality in South Australia covered by postcode 5259. Postcode 5259 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Wellington East business listing Be the first listing in Wellington East Common questionsWhat is the postcode for Wellington East?Wellington East, SA has the postcode 5259.What state is Wellington East in?Wellington East is in South Australia (SA).Does postcode 5259 cover more than one suburb?Yes. Postcode 5259 covers 12 localities, so the postcode alone does not identify Wellington East. Browse other postcodes in South Australia, or widen the search to every Australian postcode.