Home Postcode finder NSW Black Mountain Black Mountain postcode NSW Black Mountain is a locality in New South Wales covered by postcode 2365. Postcode 2365 State or territory New South Wales (NSW) Region NSW North Coast Add a free Black Mountain business listing More business listings in Black Mountain Businesses in Black MountainBlack Mountain Public SchoolLot 2 Black Mountain Rd · 02 67750192 Common questionsWhat is the postcode for Black Mountain?Black Mountain, NSW has the postcode 2365.What state is Black Mountain in?Black Mountain is in New South Wales (NSW).Does postcode 2365 cover more than one suburb?Yes. Postcode 2365 covers 26 localities, so the postcode alone does not identify Black Mountain. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.