Home Postcode finder SA Montarra Montarra postcode SA Montarra is a locality in South Australia covered by postcode 5172. Postcode 5172 State or territory South Australia (SA) Region Adelaide Add a free Montarra business listing Be the first listing in Montarra Common questionsWhat is the postcode for Montarra?Montarra, SA has the postcode 5172.What state is Montarra in?Montarra is in South Australia (SA).Does postcode 5172 cover more than one suburb?Yes. Postcode 5172 covers 13 localities, so the postcode alone does not identify Montarra. Browse other postcodes in South Australia, or widen the search to every Australian postcode.