Marlboro, NJ is a city located in Monmouth County, New Jersey and has a land area of 12.38 square miles (32.06 km2). The water area for the city is 0.06 square miles or 0.16 km2. There is one unique zip code in Marlboro, New Jersey and it is 07746. The area code(s) for Marlboro is 732/908/848.
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