Asbury Park is a beachfront city in Monmouth County, New Jersey, United States, located on the Jersey Shore and part of the New York City Metropolitan Area. As of the 2020 United States Census, the c…Asbury Park is a beachfront city in Monmouth County, New Jersey, United States, located on the Jersey Shore and part of the New York City Metropolitan Area. As of the 2020 United States Census, the city's population was 15,188 a decrease from 16,116 in 2010, reflecting a decline of 814 from the 16,930 counted in the 2000 Census, which had in turn increased by 131 from the 16,799 counted in the 1990 Census.