Montclair is a township in Essex County in the U.S. state of New Jersey. Situated on the cliffs of the Watchung Mountains, Montclair is a commercial and cultural hub of North Jersey and a diverse bedroom community of New York City within the New York metropolitan area. The township is the home of Montclair State University, the state's second-largest university.

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.