Beach Haven is a borough in Ocean County, New Jersey, United States, that is located on Long Beach Island and borders the Atlantic Ocean. As of the 2010 United States Census, the borough's population was 1,170, reflecting a decline of 108 from the 1,278 counted in the 2000 Census, which had in turn declined by 197 from the 1,475 counted in the 1990 Census.Beach Haven was incorporated as a Borough by an act of the New Jersey Legislature on November 11, 1890, from portions of Eagleswood Township, based on the results of a referendum held five days earlier.It was ranked the ninth-best beach in New Jersey in the 2008 Top 10 Beaches Contest sponsored by the New Jersey Marine Sciences Consortium.