Hightstown, NJ is a city located in Mercer County, New Jersey and has a land area of 18.04 square miles (46.72 km2). The water area for the city is 0.12 square miles or 0.31 km2. There is one unique zip code in Hightstown, New Jersey and it is 08520. The area code(s) for Hightstown is 609.
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