Home Postcode finder SA Mount Barker Springs Mount Barker Springs postcode SA Mount Barker Springs is a locality in South Australia covered by postcode 5251. Postcode 5251 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Mount Barker Springs business listing Be the first listing in Mount Barker Springs Common questionsWhat is the postcode for Mount Barker Springs?Mount Barker Springs, SA has the postcode 5251.What state is Mount Barker Springs in?Mount Barker Springs is in South Australia (SA).Does postcode 5251 cover more than one suburb?Yes. Postcode 5251 covers 6 localities, so the postcode alone does not identify Mount Barker Springs. Browse other postcodes in South Australia, or widen the search to every Australian postcode.