Home Postcode finder SA Mount Wedge Mount Wedge postcode SA Mount Wedge is a locality in South Australia covered by postcode 5670. Postcode 5670 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Mount Wedge business listing Be the first listing in Mount Wedge Common questionsWhat is the postcode for Mount Wedge?Mount Wedge, SA has the postcode 5670.What state is Mount Wedge in?Mount Wedge is in South Australia (SA).Does postcode 5670 cover more than one suburb?Yes. Postcode 5670 covers 11 localities, so the postcode alone does not identify Mount Wedge. Browse other postcodes in South Australia, or widen the search to every Australian postcode.