Home Postcode finder SA Rudall Rudall postcode SA Rudall is a locality in South Australia covered by postcode 5642. Postcode 5642 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Rudall business listing Be the first listing in Rudall Common questionsWhat is the postcode for Rudall?Rudall, SA has the postcode 5642.What state is Rudall in?Rudall is in South Australia (SA).Does postcode 5642 cover more than one suburb?Yes. Postcode 5642 covers 5 localities, so the postcode alone does not identify Rudall. Browse other postcodes in South Australia, or widen the search to every Australian postcode.