The Illinois State League was a Class D organization that operated in 1947 and 1948. This league was the
forerunner of the present day Midwest League.
'Illinois' 'State' (D 1947-48)
Belleville, IL: 1947-48
Centralia, IL: 1947-48
Marion, IL: 1947-48
Mattoon, IL: 1947-48
Mount Vernon, IL: 1947-48
West Frankfort, IL: 1947-48