Home Postcode finder NSW Mount Marsh Mount Marsh postcode NSW Mount Marsh is a locality in New South Wales covered by postcode 2469. Postcode 2469 State or territory New South Wales (NSW) Region NSW North Coast Add a free Mount Marsh business listing Be the first listing in Mount Marsh Common questionsWhat is the postcode for Mount Marsh?Mount Marsh, NSW has the postcode 2469.What state is Mount Marsh in?Mount Marsh is in New South Wales (NSW).Does postcode 2469 cover more than one suburb?Yes. Postcode 2469 covers 58 localities, so the postcode alone does not identify Mount Marsh. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.