Home Postcodes by state NSW 2703 Postcode 2703 2703 is the postcode for Yanco, NSW. Localities with postcode 2703YancoNSW Postcode 2703 State or territory New South Wales (NSW) Localities 1 Council area Leeton Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2702 · Postcode 2705