Home Postcodes by state NSW 2068 Postcode 2068 2068 is the postcode for 6 localities in NSW: Castlecrag, Middle Cove, North Willoughby, Willoughby, Willoughby East and Willoughby North. Localities with postcode 2068CastlecragNSWMiddle CoveNSWNorth WilloughbyNSWWilloughbyNSWWilloughby EastNSWWilloughby NorthNSW Postcode 2068 State or territory New South Wales (NSW) Localities 6 Council area Willoughby Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2067 · Postcode 2069