Lake Hiawatha, NJ is a city located in Morris County, New Jersey and has a land area of 1.27 square miles (3.29 km2). The water area for the city is 0.01 square miles or 0.03 km2. There is one unique zip code in Lake Hiawatha, New Jersey and it is 07034. The area code(s) for Lake Hiawatha is 862.
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