Home Postcode finder NSW Wantagong Wantagong postcode NSW Wantagong is a locality in New South Wales covered by postcode 2644. Postcode 2644 State or territory New South Wales (NSW) Region Canberra Add a free Wantagong business listing Be the first listing in Wantagong Common questionsWhat is the postcode for Wantagong?Wantagong, NSW has the postcode 2644.What state is Wantagong in?Wantagong is in New South Wales (NSW).Does postcode 2644 cover more than one suburb?Yes. Postcode 2644 covers 10 localities, so the postcode alone does not identify Wantagong. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.