mount-marsden postcode nswst Home ›› Postcode Finder ›› NSWST ›› Mount-Marsden Mount Marsden local listingsThe suburb of Mount Marsden is located in NSW and has a postcode of 2849. Free mount marsden business listing! Get the first free listing in mount marsden! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.