Home Postcode finder SA Port Clinton Port Clinton postcode SA Port 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 Port Clinton business listing Be the first listing in Port Clinton Common questionsWhat is the postcode for Port Clinton?Port Clinton, SA has the postcode 5570.What state is Port Clinton in?Port 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 Port Clinton. Browse other postcodes in South Australia, or widen the search to every Australian postcode.