castle-doyle postcode nswdl Home ›› Postcode Finder ›› NSWDL ›› Castle-Doyle Castle Doyle local listingsThe suburb of Castle Doyle is located in NSW and has a postcode of 2350. Free castle doyle business listing! Get the first free listing in castle doyle! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.