Home Postcodes by state NSW 2081 Postcode 2081 2081 is the postcode for 2 localities in NSW: Berowra and Cowan. Localities with postcode 2081BerowraNSWCowanNSW Postcode 2081 State or territory New South Wales (NSW) Localities 2 Council area Hornsby Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2080 · Postcode 2082