Bayville is an unincorporated community located within Berkeley Township in Ocean County, New Jersey, United States.

[5] 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 (ZCTA) 08721 was 20,512.

Bayville is home to the majority of Double Trouble State Park, where Ocean Spray manages a cranberry bog.

[7] Bayville received 21 inches (530 mm) of snow in the January 2022 North American blizzard, the most of any place in the state.