Holmdel, NJ is a city located in Monmouth County, New Jersey and has a land area of 17.77 square miles (46.02 km2). The water area for the city is 0.20 square miles or 0.52 km2. There is one unique zip code in Holmdel, New Jersey and it is 07733. The area code(s) for Holmdel is 732.
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