Home Postcode finder NSW Dudley Dudley postcode NSW Dudley is a locality in New South Wales covered by postcode 2290. Postcode 2290 State or territory New South Wales (NSW) Region Hunter Add a free Dudley business listing More business listings in Dudley Businesses in DudleyDudley Public School124 Ocean St · 02 49447203 Common questionsWhat is the postcode for Dudley?Dudley, NSW has the postcode 2290.What state is Dudley in?Dudley is in New South Wales (NSW).Does postcode 2290 cover more than one suburb?Yes. Postcode 2290 covers 10 localities, so the postcode alone does not identify Dudley. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.