Home Postcode finder SA Newland Newland postcode SA Newland is a locality in South Australia covered by postcode 5223. Postcode 5223 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Newland business listing Be the first listing in Newland Common questionsWhat is the postcode for Newland?Newland, SA has the postcode 5223.What state is Newland in?Newland is in South Australia (SA).Does postcode 5223 cover more than one suburb?Yes. Postcode 5223 covers 30 localities, so the postcode alone does not identify Newland. Browse other postcodes in South Australia, or widen the search to every Australian postcode.