Home Postcodes by state SA Durham Downs Durham Downs postcode SA Durham 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 Durham Downs business listing Be the first listing in Durham Downs Also in postcode 5731Coopers CreekSA 5731Cordillo DownsSA 5731InnaminckaSA 5731Leigh CreekSA 5731LyndhurstSA 5731Merty MertySA 5731MoolawatanaSA 5731WitchelinaSA 5731 Other places called Durham DownsDurham DownsQLD 4454 Common questionsWhat is the postcode for Durham Downs?Durham Downs, SA has the postcode 5731.What state is Durham Downs in?Durham 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 Durham Downs. Browse other postcodes in South Australia, or widen the search to every Australian postcode.