Home Postcodes by state NSW 2702 Postcode 2702 2702 is the postcode for Ganmain, NSW. Localities with postcode 2702GanmainNSW Postcode 2702 State or territory New South Wales (NSW) Localities 1 Council area Coolamon Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2701 · Postcode 2703