Old Bridge Township is a township in Middlesex County, New Jersey, United States. As of the 2010 United States Census, the township had a total population of 65,375, reflecting an increase of 4,919 from the 60,456 counted in the 2000 Census, which had in turn increased by 3,981 from the 56,475 counted in the 1990 Census. As of the 2010 Census, the township was the state's 18th largest municipality, after being the state's 21st most-populous municipality in 2000. Old Bridge is a bedroom suburb of New York City located across the Raritan Bay from Staten Island, and it is about 25 miles from Manhattan, and about 30 miles south of Newark.What is now Old Bridge Township was originally incorporated as Madison Township by an act of the New Jersey Legislature on March 2, 1869, from portions of South Amboy Township. In a referendum held on November 5, 1975, voters approved changing the township's name to Old Bridge Township by a margin of 7,150 votes to 4,888.