Home Postcode finder SA Waddikee Waddikee postcode SA Waddikee is a locality in South Australia covered by postcode 5640. Postcode 5640 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Waddikee business listing Be the first listing in Waddikee Common questionsWhat is the postcode for Waddikee?Waddikee, SA has the postcode 5640.What state is Waddikee in?Waddikee is in South Australia (SA).Does postcode 5640 cover more than one suburb?Yes. Postcode 5640 covers 4 localities, so the postcode alone does not identify Waddikee. Browse other postcodes in South Australia, or widen the search to every Australian postcode.