duncans-creek postcode nsw Home ›› Postcode Finder ›› NSW ›› Duncans-Creek Duncans Creek local listingsThe suburb of Duncans Creek is located in NSW and has a postcode of 2340. Free duncans creek business listing! Get the first free listing in duncans creek! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.