| Illinois–Indiana League | |
| Sport: | Minor League Baseball |
| President: | J.W. Irwin (1889) A.S. Miller (1889) W.W. Kent (1892) |
| Inaugural: | 1889 |
| Teams: | 13 |
| Country: | United States of America |
| Continent: | or |
| Continents: | --> |
| Folded: | 1892 |
| Most Champs: | 1 Terre Haute (1889) Joliet Convicts (1892) |
| Classification: | Independent (1889, 1892) |
The Illinois–Indiana League or Two–I League was based in Illinois and Indiana and refers the name of two different baseball circuits in Minor league baseball which operated in and . The league was renamed to the Illinois-Iowa League in 1890 and 1891.
1889
| Bloomington Blues | |
| Danville Browns | |
| Decatur | |
| Lafayette | |
| Logansport/Champaign-Urbana Clippers | |
| Terre Haute | |
| Aurora Indians/Peoria Distillers | |
| Evansville | |
| Jacksonville Lunatics | |
| Joliet Convicts | |
| Quincy Ravens | |
| Rock Island-Moline Twins | |
| Rockford Hustlers | |
| Terre Haute Hottentots | |
1889 Illinois–Indiana League
| Team standings | W | L | PCT | GB | Managers | |
|---|---|---|---|---|---|---|
| Terre Haute | 20 | 4 | .833 | – | William Schneider | |
| Danville Browns | 14 | 13 | .519 | 7.5 | Harry Smith | |
| 5 | 5 | .500 | NA | Von Elleau | ||
| Decatur | 0 | 10 | .000 | NA | NA | |
| NA | NA | NA | NA | F.L. Bills | ||
| Lafayette | NA | NA | NA | NA |
| Team standings | W | L | PCT | GB | Managers | |
|---|---|---|---|---|---|---|
| Joliet Convicts | 55 | 27 | .671 | – | ||
| Rockford Hustlers | 46 | 38 | .549 | 10.0 | ||
| Rock Island-Moline Twins | 37 | 42 | .468 | 16.5 | ||
| Jacksonville Lunatics | 30 | 57 | .345 | 27.5 | ||
| 30 | 20 | .600 | NA | |||
| 26 | 27 | .491 | NA | |||
| 25 | 27 | .481 | NA | George Brackett / Charles Flynn | ||
| 12 | 23 | .343 | NA | Bill Whitrock / John Godar / Samuel Levesque |
| Fred Underwood | Rockford | BA | .282 | Bumpus Jones | Joliet | W | 24 | ||
| Ed Wiswell | Rockford | Runs | 77 | George Nicol | Rockford | SO | 230 | ||
| Gene Moriarty | Evansville/Jacksonville | Hits | 91 | Ernest Beam | Terre Haute | ERA | 0.91 | ||
| Gene Moriarty | Evansville/Jacksonville | HR | 13 | Bumpus Jones | Joliet | PCT | .857 24–4 |