Home Postcodes by state NSW 2578 Postcode 2578 2578 is the postcode for Bundanoon, NSW. Localities with postcode 2578BundanoonNSW Postcode 2578 State or territory New South Wales (NSW) Localities 1 Council area Wingecarribee Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2577 · Postcode 2579