a city and the county-seat of Boone county, Illinois, U.S.A., in the N. part of the state, on the Kishwaukee river, about 78 m. N.W. of Chicago. Pop. (1890) 3867; (1900) 6937, of whom 1018 were foreign-born. It is served by the Chicago & North-Western railway, and by an extensive interurban electric system. Among its manufactures are sewing machines, boilers, automobiles, bicycles, roller-skates, pianos, gloves and mittens, corsets, flour and dairy products, Borden's condensed milk factory being located there. Belvidere was settled in 1836, was incorporated in 1852 and was re-incorporated in 1881.