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Bayville is an unincorporated community located within Berkeley Township in Ocean County, New Jersey, United States. The area is served as United States Postal Service ZIP Code 08721. As of the 2010 United States Census, the population for ZIP Code Tabulation Area 08721 was 20,512. Central Regional High School is the local high school for the area.Bayville is home to Double Trouble State Park, the site of an Ocean Spray cranberry bog, and is said to be haunted by the New Jersey Devil.People who were born in, residents of, or otherwise closely associated with Bayville include: