Home Postcode finder SA Woolundunga Woolundunga postcode SA Woolundunga is a locality in South Australia covered by postcode 5710. Postcode 5710 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Woolundunga business listing Be the first listing in Woolundunga Common questionsWhat is the postcode for Woolundunga?Woolundunga, SA has the postcode 5710.What state is Woolundunga in?Woolundunga is in South Australia (SA).Does postcode 5710 cover more than one suburb?Yes. Postcode 5710 covers 11 localities, so the postcode alone does not identify Woolundunga. Browse other postcodes in South Australia, or widen the search to every Australian postcode.