Middleville, NJ is a city located in Sussex County, New Jersey and has a land area of 0.00 square miles (0.00 km2). The water area for the city is 0.00 square miles or 0.00 km2. There is one unique zip code in Middleville, New Jersey and it is 07855. The area code(s) for Middleville is 973/862.
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