Home Postcode finder NSW Wybung Wybung postcode NSW Wybung is a locality in New South Wales covered by postcode 2259. Postcode 2259 State or territory New South Wales (NSW) Region Gosford Add a free Wybung business listing Be the first listing in Wybung Common questionsWhat is the postcode for Wybung?Wybung, NSW has the postcode 2259.What state is Wybung in?Wybung is in New South Wales (NSW).Does postcode 2259 cover more than one suburb?Yes. Postcode 2259 covers 42 localities, so the postcode alone does not identify Wybung. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.