Home Postcodes by state NSW 2306 Postcode 2306 2306 is the postcode for Windale, NSW. Localities with postcode 2306WindaleNSW Postcode 2306 State or territory New South Wales (NSW) Localities 1 Council area Lake Macquarie Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2305 · Postcode 2307