High Quality Content by WIKIPEDIA articles! Bradley Beach is a borough in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the borough`s population was 4,298, reflecting a decline of 495 (-10.3%) from the 4,793 counted in the 2000 Census, which had in turn increased by 318 (+7.1%) from the 4,475 counted in the 1990 Census. The summer population can reach 30,000.