Rutherford 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 18,834, an increase of 773 (+4.3%) from the 2010 census count of 18,061, which in turn reflected a decline of 49 (−0.3%) from the 18,110 counted in the 2000 census.