Home Postcode finder NSW Mount Marsden Mount Marsden postcode NSW Mount Marsden is a locality in New South Wales covered by postcode 2849. Postcode 2849 State or territory New South Wales (NSW) Region NSW Country West Add a free Mount Marsden business listing Be the first listing in Mount Marsden Common questionsWhat is the postcode for Mount Marsden?Mount Marsden, NSW has the postcode 2849.What state is Mount Marsden in?Mount Marsden is in New South Wales (NSW).Does postcode 2849 cover more than one suburb?Yes. Postcode 2849 covers 29 localities, so the postcode alone does not identify Mount Marsden. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.