Home Postcode finder SA Dorset Vale Dorset Vale postcode SA Dorset Vale is a locality in South Australia covered by postcode 5157. Postcode 5157 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Dorset Vale business listing Be the first listing in Dorset Vale Common questionsWhat is the postcode for Dorset Vale?Dorset Vale, SA has the postcode 5157.What state is Dorset Vale in?Dorset Vale is in South Australia (SA).Does postcode 5157 cover more than one suburb?Yes. Postcode 5157 covers 8 localities, so the postcode alone does not identify Dorset Vale. Browse other postcodes in South Australia, or widen the search to every Australian postcode.