Home Postcode finder SA North Beach North Beach postcode SA North Beach is a locality in South Australia covered by postcode 5556. Postcode 5556 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free North Beach business listing Be the first listing in North Beach Common questionsWhat is the postcode for North Beach?North Beach, SA has the postcode 5556.What state is North Beach in?North Beach is in South Australia (SA).Does postcode 5556 cover more than one suburb?Yes. Postcode 5556 covers 4 localities, so the postcode alone does not identify North Beach. Browse other postcodes in South Australia, or widen the search to every Australian postcode.