Home Postcode finder SA Bolto Bolto postcode SA Bolto is a locality in South Australia covered by postcode 5238. Postcode 5238 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Bolto business listing Be the first listing in Bolto Common questionsWhat is the postcode for Bolto?Bolto, SA has the postcode 5238.What state is Bolto in?Bolto is in South Australia (SA).Does postcode 5238 cover more than one suburb?Yes. Postcode 5238 covers 31 localities, so the postcode alone does not identify Bolto. Browse other postcodes in South Australia, or widen the search to every Australian postcode.