Home Postcode finder SA Charleston Charleston postcode SA Charleston is a locality in South Australia covered by postcode 5244. Postcode 5244 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Charleston business listing Be the first listing in Charleston Common questionsWhat is the postcode for Charleston?Charleston, SA has the postcode 5244.What state is Charleston in?Charleston is in South Australia (SA).Does postcode 5244 cover more than one suburb?Yes. Postcode 5244 covers 5 localities, so the postcode alone does not identify Charleston. Browse other postcodes in South Australia, or widen the search to every Australian postcode.