Home Postcode finder NSW Mandalong Mandalong postcode NSW Mandalong is a locality in New South Wales covered by postcode 2264. Postcode 2264 State or territory New South Wales (NSW) Region Gosford Add a free Mandalong business listing Be the first listing in Mandalong Common questionsWhat is the postcode for Mandalong?Mandalong, NSW has the postcode 2264.What state is Mandalong in?Mandalong is in New South Wales (NSW).Does postcode 2264 cover more than one suburb?Yes. Postcode 2264 covers 14 localities, so the postcode alone does not identify Mandalong. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.