Harrington Park is a borough in Bergen County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 4,741, an increase of 77 (+1.7%) from the 2010 census count of 4,664, which in turn reflected a decrease of 76 (−1.6%) from the 4,740 counted in the 2000 census.Table 7. Population for the Counties and Municipalities in New Jersey: 1990, 2000 and 2010, New Jersey Department of Labor and Workforce Development, February 2011. Accessed May 1, 2023.
