Home Postcode finder NSW Diamond Head Diamond Head postcode NSW Diamond Head is a locality in New South Wales covered by postcode 2443. Postcode 2443 State or territory New South Wales (NSW) Region NSW North Coast Add a free Diamond Head business listing Be the first listing in Diamond Head Common questionsWhat is the postcode for Diamond Head?Diamond Head, NSW has the postcode 2443.What state is Diamond Head in?Diamond Head is in New South Wales (NSW).Does postcode 2443 cover more than one suburb?Yes. Postcode 2443 covers 19 localities, so the postcode alone does not identify Diamond Head. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.