Dunellen, NJ is a city located in Middlesex County, New Jersey and has a land area of 5.08 square miles (13.16 km2). The water area for the city is 0.01 square miles or 0.03 km2. There is one unique zip code in Dunellen, New Jersey and it is 08812. The area code(s) for Dunellen is 732/848.
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