Home Postcodes by state NSW 2080 Postcode 2080 2080 is the postcode for Mount Kuring-Gai, NSW. Localities with postcode 2080Mount Kuring-GaiNSW Postcode 2080 State or territory New South Wales (NSW) Localities 1 Council area Hornsby Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2079 · Postcode 2081