Montclair (/mɒntˈklɛər/ or /mɒŋˈklɛər/) is a township in Essex County, New Jersey, United States. As of the 2010 United States Census, the township's population was 37,669, reflecting a decline of 1,308 (-3.4%) from the 38,977 counted in the 2000 Census, which had in turn increased by 1,248 (+3.3%) from the 37,729 counted in the 1990 Census. As of 2010 it was the 60th-most-populous municipality by population in New Jersey.
Montclair was first formed as a Township on April 15, 1868, from portions of Bloomfield Township, so that a railroad could be built to Montclair. After a referendum held on February 21, 1894, Montclair was reincorporated as a Town, effective February 24, 1894. In the late 1970s, after protesting for years at the inequities built into the formulas, Montclair joined several other communities to qualify for a pool of federal aid allocated only to Townships, that allowed townships to receive as much as double the revenue-sharing aid per capita received by the four other types of New Jersey municipalities — Borough, City, Town or Village.
Montclair was the setting for some of the stories in the HBO television series The Sopranos, and many Montclair streets, locations and businesses were featured in the show, such as Bloomfield Avenue.