| Marlboro is a Township in Monmouth County, New Jersey, United States. As of the United States 2000 Census, the township had a population of 36,398. The Census Bureau's 2005 population estimate shows that the Township has grown to 39,843, an increase of almost 9.5% since the last decennial census. Marlboro was formed as a Township by an Act of the New Jersey Legislature on February 17, 1848, from portions of Freehold Township. |