wantagong postcode nswst Home ›› Postcode Finder ›› NSWST ›› Wantagong Wantagong local listingsThe suburb of Wantagong is located in NSW and has a postcode of 2644. Free wantagong business listing! Get the first free listing in wantagong! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.