Home Postcode finder SA Mount Schank Mount Schank postcode SA Mount Schank is a locality in South Australia covered by postcode 5291. Postcode 5291 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Mount Schank business listing Be the first listing in Mount Schank Common questionsWhat is the postcode for Mount Schank?Mount Schank, SA has the postcode 5291.What state is Mount Schank in?Mount Schank is in South Australia (SA).Does postcode 5291 cover more than one suburb?Yes. Postcode 5291 covers 34 localities, so the postcode alone does not identify Mount Schank. Browse other postcodes in South Australia, or widen the search to every Australian postcode.