Home Postcode finder NSW Marys Mount Marys Mount postcode NSW Marys Mount is a locality in New South Wales covered by postcode 2380. Postcode 2380 State or territory New South Wales (NSW) Region NSW North Coast Add a free Marys Mount business listing Be the first listing in Marys Mount Common questionsWhat is the postcode for Marys Mount?Marys Mount, NSW has the postcode 2380.What state is Marys Mount in?Marys Mount is in New South Wales (NSW).Does postcode 2380 cover more than one suburb?Yes. Postcode 2380 covers 9 localities, so the postcode alone does not identify Marys Mount. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.