Howell Township is a township in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the township's population was 51,075, reflecting an increase of 2,172 (+4.4%) from the 48,903 counted in the 2000 Census, which had in turn increased by 9,916 (+25.4%) from the 38,987 counted in the 1990 Census.