Home Postcode finder SA Binnum Binnum postcode SA Binnum is a locality in South Australia covered by postcode 5262. Postcode 5262 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Binnum business listing Be the first listing in Binnum Common questionsWhat is the postcode for Binnum?Binnum, SA has the postcode 5262.What state is Binnum in?Binnum is in South Australia (SA).Does postcode 5262 cover more than one suburb?Yes. Postcode 5262 covers 4 localities, so the postcode alone does not identify Binnum. Browse other postcodes in South Australia, or widen the search to every Australian postcode.