Phillipsburg, NJ is a city located in Warren County, New Jersey and has a land area of 41.47 square miles (107.41 km2). The water area for the city is 0.96 square miles or 2.49 km2. There is one unique zip code in Phillipsburg, New Jersey and it is 08865. The area code(s) for Phillipsburg is 908.
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