Home Postcodes by state NSW 2069 Postcode 2069 2069 is the postcode for 3 localities in NSW: Castle Cove, Roseville and Roseville Chase. Localities with postcode 2069Castle CoveNSWRosevilleNSWRoseville ChaseNSW Postcode 2069 State or territory New South Wales (NSW) Localities 3 Council area Willoughby; Mainly Ku-ring-gai, partly Willoughby; Ku-ring-gai Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2068 · Postcode 2070