Home Postcode finder SA Mount Bryan Mount Bryan postcode SA Mount Bryan is a locality in South Australia covered by postcode 5418. Postcode 5418 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Mount Bryan business listing Be the first listing in Mount Bryan Common questionsWhat is the postcode for Mount Bryan?Mount Bryan, SA has the postcode 5418.What state is Mount Bryan in?Mount Bryan is in South Australia (SA).Does postcode 5418 cover more than one suburb?Yes. Postcode 5418 covers 2 localities, so the postcode alone does not identify Mount Bryan. Browse other postcodes in South Australia, or widen the search to every Australian postcode.