martins-creek postcode nswst Home ›› Postcode Finder ›› NSWST ›› Martins-Creek Martins Creek local listingsThe suburb of Martins Creek is located in NSW and has a postcode of 2420. Free martins creek business listing! Get the first free listing in martins creek! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.