lake-munmorah postcode nswst Home ›› Postcode Finder ›› NSWST ›› Lake-Munmorah Lake Munmorah local listingsThe suburb of Lake Munmorah is located in NSW and has a postcode of 2259. Free lake munmorah business listing! Get the first free listing in lake munmorah! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.