castle-cove postcode nswst Home ›› Postcode Finder ›› NSWST ›› Castle-Cove Castle Cove local listingsThe suburb of Castle Cove is located in NSW and has a postcode of 2069. Free castle cove business listing! Get the first free listing in castle cove! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.