Wyckoff 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 16,585, a decrease of 111 (−0.7%) from the 2010 census count of 16,696, which in turn reflected an increase of 188 (+1.1%) from the 16,508 counted in the 2000 census.