| Formerly | Wisconsin–Illinois League |
|---|---|
| Classification | Class D (1915) |
| Sport | Minor League Baseball |
| First season | 1915 |
| Ceased | July 7, 1915 |
| President | B. M. Parsons (1915) |
| No. of teams | 6 |
| Country | United States of America |
| Most titles | 1 Streator Boosters (1915) |
| Related competitions | Bi-State League |
The Bi-State League was an American baseball Class D level minor league which operated in 1915. It was the successor of the Wisconsin–Illinois League and was represented by five teams from Illinois and one from Wisconsin. The Bi-State folded during the 1915 season.