Home Postcode finder SA Ashville Ashville postcode SA Ashville is a locality in South Australia covered by postcode 5259. Postcode 5259 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Ashville business listing Be the first listing in Ashville Common questionsWhat is the postcode for Ashville?Ashville, SA has the postcode 5259.What state is Ashville in?Ashville is in South Australia (SA).Does postcode 5259 cover more than one suburb?Yes. Postcode 5259 covers 12 localities, so the postcode alone does not identify Ashville. Browse other postcodes in South Australia, or widen the search to every Australian postcode.