Essex Fells is a borough in Essex County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 2,113, reflecting a decline of 49 (-2.3%) from the 2,162 counted in the 2000 Census, which had in turn increased by 23 (+1.1%) from the 2,139 counted in the 1990 Census.
Essex Fells was incorporated as a borough by an Act of the New Jersey Legislature on March 31, 1902, from portions of Caldwell Township (now Fairfield Township). In 1981, Essex Fells became a township to take advantage of federal revenue sharing policies. Effective January 1, 1992, it again became a borough.
New Jersey Monthly magazine ranked Essex Fells as its 10th best place to live in its 2008 rankings of the "Best Places To Live" in New Jersey.