Home Postcode finder SA Jamieson Jamieson postcode SA Jamieson is a locality in South Australia covered by postcode 5640. Postcode 5640 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Jamieson business listing Be the first listing in Jamieson Common questionsWhat is the postcode for Jamieson?Jamieson, SA has the postcode 5640.What state is Jamieson in?Jamieson is in South Australia (SA).Does postcode 5640 cover more than one suburb?Yes. Postcode 5640 covers 4 localities, so the postcode alone does not identify Jamieson. Browse other postcodes in South Australia, or widen the search to every Australian postcode.