Home Postcodes by state NSW 2845 Postcode 2845 2845 is the postcode for Wallerawang, NSW. Localities with postcode 2845WallerawangNSW Postcode 2845 State or territory New South Wales (NSW) Localities 1 Council area Lithgow Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2844 · Postcode 2846