Manville is a borough in Somerset County, New Jersey, United States. The borough is located in the heart of the Raritan Valley region and is a part of the New York metropolitan area. As of the 2010 United States Census, the borough's population was 10,344, reflecting an increase of one person (+0.0%) from the 10,343 counted in the 2000 Census, which had in turn declined by 224 (-2.1%) from the 10,567 counted in the 1990 Census. Manville was named after the Johns-Manville Corporation, which maintained a large manufacturing facility in the borough for decades.