Home Postcode finder NSW Mountain Creek Mountain Creek postcode NSW Mountain Creek is a locality in New South Wales covered by postcode 2644. Postcode 2644 State or territory New South Wales (NSW) Region Canberra Add a free Mountain Creek business listing Be the first listing in Mountain Creek Common questionsWhat is the postcode for Mountain Creek?Mountain Creek, NSW has the postcode 2644.What state is Mountain Creek in?Mountain Creek is in New South Wales (NSW).Does postcode 2644 cover more than one suburb?Yes. Postcode 2644 covers 10 localities, so the postcode alone does not identify Mountain Creek. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.