Lake Hopatcong, NJ is a city located in Morris County, New Jersey and has a land area of 6.70 square miles (17.35 km2). The water area for the city is 1.99 square miles or 5.15 km2. There is one unique zip code in Lake Hopatcong, New Jersey and it is 07849. The area code(s) for Lake Hopatcong is 973.
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