Iselin, NJ is a city located in Middlesex County, New Jersey and has a land area of 3.16 square miles (8.18 km2). The water area for the city is 0.00 square miles or 0.00 km2. There is one unique zip code in Iselin, New Jersey and it is 08830. The area code(s) for Iselin is 732/908.
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