Home Postcode finder SA Kelly Kelly postcode SA Kelly is a locality in South Australia covered by postcode 5641. Postcode 5641 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Kelly business listing Be the first listing in Kelly Common questionsWhat is the postcode for Kelly?Kelly, SA has the postcode 5641.What state is Kelly in?Kelly is in South Australia (SA).Does postcode 5641 cover more than one suburb?Yes. Postcode 5641 covers 13 localities, so the postcode alone does not identify Kelly. Browse other postcodes in South Australia, or widen the search to every Australian postcode.