Home Postcode finder NSW Widden Widden postcode NSW Widden is a locality in New South Wales covered by postcode 2328. Postcode 2328 State or territory New South Wales (NSW) Region Hunter Add a free Widden business listing Be the first listing in Widden Common questionsWhat is the postcode for Widden?Widden, NSW has the postcode 2328.What state is Widden in?Widden is in New South Wales (NSW).Does postcode 2328 cover more than one suburb?Yes. Postcode 2328 covers 10 localities, so the postcode alone does not identify Widden. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.