Home Postcode finder NSW Mount Royal Mount Royal postcode NSW Mount Royal is a locality in New South Wales covered by postcode 2330. Postcode 2330 State or territory New South Wales (NSW) Region Hunter Add a free Mount Royal business listing Be the first listing in Mount Royal Common questionsWhat is the postcode for Mount Royal?Mount Royal, NSW has the postcode 2330.What state is Mount Royal in?Mount Royal is in New South Wales (NSW).Does postcode 2330 cover more than one suburb?Yes. Postcode 2330 covers 63 localities, so the postcode alone does not identify Mount Royal. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.