ROOSEVELT, a borough of Middlesex co., N. J. It has a frontage on Staten Island Sound, and on the Rahway river, and is on the Central of New Jersey railroad. It was formed in 1906 by the consolidation of three districts. It is an important industrial city and has manufactures of steel, fertilizers, metal goods, cigars, paints, etc. Pop. (1910) 5,786; (1920) 11,047.