Home Postcodes by state NSW 2836 Postcode 2836 2836 is the postcode for 2 localities in NSW: White Cliffs and Wilcannia. Localities with postcode 2836White CliffsNSWWilcanniaNSW Postcode 2836 State or territory New South Wales (NSW) Localities 2 Council area Mainly Central Darling, partly Unincorporated NSW; Central Darling Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2835 · Postcode 2839