Home Postcode finder NSW Round Mountain Round Mountain postcode NSW Round Mountain is a locality in New South Wales covered by postcode 2484. Postcode 2484 State or territory New South Wales (NSW) Region Gold Coast Add a free Round Mountain business listing Be the first listing in Round Mountain Common questionsWhat is the postcode for Round Mountain?Round Mountain, NSW has the postcode 2484.What state is Round Mountain in?Round Mountain is in New South Wales (NSW).Does postcode 2484 cover more than one suburb?Yes. Postcode 2484 covers 56 localities, so the postcode alone does not identify Round Mountain. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.