Home Postcode finder SA Montacute Montacute postcode SA Montacute is a locality in South Australia covered by postcode 5134. Postcode 5134 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Montacute business listing Be the first listing in Montacute Common questionsWhat is the postcode for Montacute?Montacute, SA has the postcode 5134.What state is Montacute in?Montacute is in South Australia (SA).Does postcode 5134 cover more than one suburb?Yes. Postcode 5134 covers 2 localities, so the postcode alone does not identify Montacute. Browse other postcodes in South Australia, or widen the search to every Australian postcode.