Home Postcode finder SA Vista Vista postcode SA Vista is a locality in South Australia covered by postcode 5091. Postcode 5091 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Vista business listing Be the first listing in Vista Common questionsWhat is the postcode for Vista?Vista, SA has the postcode 5091.What state is Vista in?Vista is in South Australia (SA).Does postcode 5091 cover more than one suburb?Yes. Postcode 5091 covers 3 localities, so the postcode alone does not identify Vista. Browse other postcodes in South Australia, or widen the search to every Australian postcode.