marengo postcode nswst Home ›› Postcode Finder ›› NSWST ›› Marengo Marengo local listingsThe suburb of Marengo is located in NSW and has a postcode of 2453. Free marengo business listing! Get the first free listing in marengo! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.