koolewong postcode nswst Home ›› Postcode Finder ›› NSWST ›› Koolewong Koolewong local listingsThe suburb of Koolewong is located in NSW and has a postcode of 2256. Free koolewong business listing! Get the first free listing in koolewong! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.