Saddle Brook is a township in Bergen County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 14,294, an increase of 635 (+4.6%) from the 2010 census count of 13,659, which in turn reflected an increase of 504 (+3.8%) from the 13,155 counted in the 2000 census.