gongolgon postcode nswst Home ›› Postcode Finder ›› NSWST ›› Gongolgon Gongolgon local listingsThe suburb of Gongolgon is located in NSW and has a postcode of 2839. Free gongolgon business listing! Get the first free listing in gongolgon! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.