Home Postcode finder NSW Hanging Rock Hanging Rock postcode NSW Hanging Rock is a locality in New South Wales covered by postcode 2340. Postcode 2340 State or territory New South Wales (NSW) Region NSW North Coast Add a free Hanging Rock business listing Be the first listing in Hanging Rock Common questionsWhat is the postcode for Hanging Rock?Hanging Rock, NSW has the postcode 2340.What state is Hanging Rock in?Hanging Rock is in New South Wales (NSW).Does postcode 2340 cover more than one suburb?Yes. Postcode 2340 covers 39 localities, so the postcode alone does not identify Hanging Rock. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.