Hillsborough, NJ is a city located in Somerset County, New Jersey and has a land area of 55.17 square miles (142.89 km2). The water area for the city is 0.52 square miles or 1.35 km2. There is one unique zip code in Hillsborough, New Jersey and it is 08844. The area code(s) for Hillsborough is 848.
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