Maplewood is a township in Essex County in the U.S. state of New Jersey. The township is an inner-ring suburban bedroom community of New York City in the New York metropolitan area. As of the 2020 United States census, the township's population was 25,684, an increase of 1,817 from the 2010 census count of 23,867, which in turn reflected a decline of …Maplewood is a township in Essex County in the U.S. state of New Jersey. The township is an inner-ring suburban bedroom community of New York City in the New York metropolitan area. As of the 2020 United States census, the township's population was 25,684, an increase of 1,817 from the 2010 census count of 23,867, which in turn reflected a decline of one person from the 23,868 counted in the 2000 census.