This article is about the township in Monmouth County. For the community within the township see Marlboro, Monmouth County, New Jersey; For other places with the same name, see Marlboro, New Jersey (disambiguation).

Marlboro Township is a township in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the township had a population of 40,191, reflecting an increase of 5,449 (+16.3%) from the 33,423 counted in the 2000 Census, which had in turn increased by 6,707 (+25.1%) from the 26,716 counted in the 1990 Census.