West Milford is a township in Passaic County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 24,862, a decrease of 988 (−3.8%) from the 2010 census count of 25,850, which in turn reflected a decline of 560 (−2.1%) from the 26,410 counted in the 2000 census. It is the largest in the county by total area, covering 80.32 square miles (208.0 km2) and more than 40% of the county. The town was home to a Warner Bros. owned theme park from 1972 to 1976 entitled Warner Bros. Jungle Habitat. The 800-acre Jungle Habitat property, containing 26 miles of paved roads, was purchased by the state in 1988 for $1.45 million and remnants of the theme park remain until today.

Oak Ridge is an unincorporated community and census-designated place (CDP) located along the border of West Milford Township in Passaic County and Jefferson Township in Morris County, in the U.S. state of New Jersey. The area is served as United States Postal Service ZIP Code 07438.