Warren Township is a township in Somerset County, New Jersey, United States. As of the 2010 United States Census, the township's population was 15,311, reflecting an increase of 1,052 from the 14,259 counted in the 2000 Census, which had in turn increased by 3,429 from the 10,830 counted in the 1990 Census.In July 2009, CNNMoney.com ranked Warren sixth in the nation on its list of "Best Places to Live" in the United States, citing in particular its schools, June carnival, "wide open spaces" per house), 74 "working farms", and proximity to New York City.