Home Postcode finder SA Cordillo Downs Cordillo Downs postcode SA Cordillo Downs is a locality in South Australia covered by postcode 5731. Postcode 5731 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Cordillo Downs business listing Be the first listing in Cordillo Downs Common questionsWhat is the postcode for Cordillo Downs?Cordillo Downs, SA has the postcode 5731.What state is Cordillo Downs in?Cordillo Downs is in South Australia (SA).Does postcode 5731 cover more than one suburb?Yes. Postcode 5731 covers 9 localities, so the postcode alone does not identify Cordillo Downs. Browse other postcodes in South Australia, or widen the search to every Australian postcode.