Home Postcode finder SA Sedan Sedan postcode SA Sedan is a locality in South Australia covered by postcode 5353. Postcode 5353 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Sedan business listing Be the first listing in Sedan Common questionsWhat is the postcode for Sedan?Sedan, SA has the postcode 5353.What state is Sedan in?Sedan is in South Australia (SA).Does postcode 5353 cover more than one suburb?Yes. Postcode 5353 covers 11 localities, so the postcode alone does not identify Sedan. Browse other postcodes in South Australia, or widen the search to every Australian postcode.