| Classification | Class D (1947–1948) |
|---|---|
| Sport | Minor League Baseball |
| First season | 1947 |
| Ceased | 1948 |
| Replaced by | Mississippi-Ohio Valley League |
| President | Howard V. Millard (1947–1948) |
| No. of teams | 6 |
| Country | United States of America |
| Most titles | 1 Belleville Stags (1947) West Frankfort Cardinals (1948) |
| Related competitions | Illinois-Indiana-Iowa League |
| Official website | Midwest League Official Website |
The Illinois State League (ISL) was a baseball minor league formed in 1947. The Illinois State League operated in 1947–1948 and evolved to become today's Midwest League. The Class D league was composed entirely of new franchises, each located in Southern Illinois. The charter franchises were in the Illinois cities of Belleville, Centralia, Marion, Mattoon, Mount Vernon and West Frankfort.[1]