Hopewell, NJ is a city located in Mercer County, New Jersey and has a land area of 22.39 square miles (57.99 km2). The water area for the city is 0.06 square miles or 0.16 km2. There is one unique zip code in Hopewell, New Jersey and it is 08525. The area code(s) for Hopewell is 609.
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