Home Postcodes by state NSW 2778 Postcode 2778 2778 is the postcode for 2 localities in NSW: Linden and Woodford. Localities with postcode 2778LindenNSWWoodfordNSW Postcode 2778 State or territory New South Wales (NSW) Localities 2 Council area Blue Mountains Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2777 · Postcode 2779