Home Postcode finder SA Clay Wells Clay Wells postcode SA Clay Wells is a locality in South Australia covered by postcode 5280. Postcode 5280 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Clay Wells business listing Be the first listing in Clay Wells Common questionsWhat is the postcode for Clay Wells?Clay Wells, SA has the postcode 5280.What state is Clay Wells in?Clay Wells is in South Australia (SA).Does postcode 5280 cover more than one suburb?Yes. Postcode 5280 covers 16 localities, so the postcode alone does not identify Clay Wells. Browse other postcodes in South Australia, or widen the search to every Australian postcode.