Califon, NJ is a city located in Hunterdon County, New Jersey and has a land area of 26.02 square miles (67.39 km2). The water area for the city is 0.18 square miles or 0.47 km2. There is one unique zip code in Califon, New Jersey and it is 07830. The area code(s) for Califon is 908.
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