Home Postcode finder SA Clinton Clinton postcode SA Clinton is a locality in South Australia covered by postcode 5570. Postcode 5570 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Clinton business listing Be the first listing in Clinton Common questionsWhat is the postcode for Clinton?Clinton, SA has the postcode 5570.What state is Clinton in?Clinton is in South Australia (SA).Does postcode 5570 cover more than one suburb?Yes. Postcode 5570 covers 4 localities, so the postcode alone does not identify Clinton. Browse other postcodes in South Australia, or widen the search to every Australian postcode.