Home Postcode finder SA Brown Beach Brown Beach postcode SA Brown Beach is a locality in South Australia covered by postcode 5222. Postcode 5222 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Brown Beach business listing Be the first listing in Brown Beach Common questionsWhat is the postcode for Brown Beach?Brown Beach, SA has the postcode 5222.What state is Brown Beach in?Brown Beach is in South Australia (SA).Does postcode 5222 cover more than one suburb?Yes. Postcode 5222 covers 17 localities, so the postcode alone does not identify Brown Beach. Browse other postcodes in South Australia, or widen the search to every Australian postcode.