FOREST PARK, a city of Cook county, Ill., U.S.A., 12m. W. of Chicago, served by the Chicago, Aurora and Elgin, the Chicago Great Western and the Soo Line railways. The population was 10,768 in 1920 and was 14,555 in 1930. It is a residential suburb, and also has a variety of manufactures, including cedar chests, mouldings, cement posts, celluloid and mica products. Floriculture is an important industry.