Home Postcode finder SA D'Estrees Bay D'Estrees Bay postcode SA D'Estrees Bay 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 D'Estrees Bay business listing Be the first listing in D'Estrees Bay Common questionsWhat is the postcode for D'Estrees Bay?D'Estrees Bay, SA has the postcode 5223.What state is D'Estrees Bay in?D'Estrees Bay 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 D'Estrees Bay. Browse other postcodes in South Australia, or widen the search to every Australian postcode.