Home Postcode finder SA Dudley East Dudley East postcode SA Dudley East is a locality in South Australia covered by postcode 5222. Postcode 5222 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Dudley East business listing Be the first listing in Dudley East Common questionsWhat is the postcode for Dudley East?Dudley East, SA has the postcode 5222.What state is Dudley East in?Dudley East is in South Australia (SA).Does postcode 5222 cover more than one suburb?Yes. Postcode 5222 covers 17 localities, so the postcode alone does not identify Dudley East. Browse other postcodes in South Australia, or widen the search to every Australian postcode.