CHICAGO HEIGHTS, a city of Cook county, Illinois, U.S.A., on Federal highway 3o, 28m. S. of Chicago. It is served by the Chicago and Eastern Illinois, the Chicago, Milwaukee and St. Paul, the Elgin, Joliet and Eastern, the Michigan Central, the Baltimore and Ohio Chicago Terminal, and the Chicago Heights Terminal Transfer railways. In 1900 the population was 5,100; in 1920, foreign-born white) ; and in 193o it was 2 2,3 21 by the Federal census. Chicago Heights is an important industrial centre, manufacturing locomotives, cars, steel rails, steel houses, steel castings, terra cotta, bottles, tile, brick, textiles, and various other commodities. The aggregate factory product in 1925 was valued at $40,659,846. The city was incorporated in 1892.