West Caldwell is a township located in the West Essex area in northwestern Essex County, in the U.S. state of New Jersey. It is located approximately 16 miles (26 km) west of Manhattan and 6 miles (9.7 km) northwest of Newark. As of the 2020 United States census, the township's population was 11,012, an increase of 253 (+2.4%) from the 2010 census count of 10,759, which in turn reflected a decline of 474 (−4.2%) from the 11,233 counted in the 2000 census.

Essex County is located in the northeastern part of the U.S. state of New Jersey, and is one of the centrally located counties in the New York metropolitan area. As of the 2020 census, the county was the state's second-most populous county, with a population of 863,728, its highest decennial count since the 1970 census and an increase of 79,759 (+10.2%) from the 2010 census count of 783,969. The county is part of the North Jersey region of the state.