Hopatcong, NJ is a city located in Sussex County, New Jersey and has a land area of 3.89 square miles (10.08 km2). The water area for the city is 1.08 square miles or 2.80 km2. There is one unique zip code in Hopatcong, New Jersey and it is 07843. The area code(s) for Hopatcong is 973/862.
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