Blairstown, NJ is a city located in Warren County, New Jersey and has a land area of 84.93 square miles (219.97 km2). The water area for the city is 2.02 square miles or 5.23 km2. There is one unique zip code in Blairstown, New Jersey and it is 07825. The area code(s) for Blairstown is 908.
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