| Class I railroads |
3,828 |
| CSX Transportation |
1,929 |
| Grand Trunk Western Railroad, Inc. |
80 |
| Norfolk Southern Corporation |
1,522 |
| Soo Line Railroad Company |
291 |
| Union Pacific Railroad Company |
6 |
| Regional railroads |
56 |
| Elgin, Joliet, & Eastern Railway |
37 |
| The Indiana & Ohio Railway |
19 |
| Local railroads |
895 |
| Algers, Winslow, & Western Railway |
16 |
| Central Railroad Company of Indiana |
60 |
| Central Railroad Company of Indianapolis |
33 |
| Chicago, South Shore, and South Bend Railroad |
69 |
| Dubois County Railroad |
16 |
| Fulton County Railroad, Inc. |
13 |
| Honey Creek Railroad, Inc. |
6 |
| Indiana Northeastern Railroad Company |
46 |
| The Indiana Rail Road |
120 |
| Indiana Southern Railroad, Inc. |
176 |
| Kankakee, Beaverville, & Southern Railroad |
76 |
| Louisville & Indiana Railroad Company |
121 |
| Madison Railroad |
26 |
| R. J. Corman/Western Ohio Line |
12 |
| Southern Indiana Railway |
5 |
| Toledo, Peoria, and Western Railway Corporation |
100 |
| Switching and terminal railroads |
249 |
| C & NC Railroad Corporation |
28 |
| Central Indiana and Western Railroad |
9 |
| Chicago Short Line Railway |
6 |
| Hoosier Southern Railroad |
24 |
| Indian Creek Railroad |
5 |
| Indiana Harbor Belt Railroad |
42 |
| Indiana Southwestern Railway Company |
23 |
| Lake Michigan & Indiana Railroad Company |
5 |
| Louisville, New Albany, and Corydon Railroad |
8 |
| Maumee & Western Railroad Corporation |
2 |
| MG Rail, Inc. |
8 |
| Michigan Southern Railroad Company, Inc. |
11 |
| Wabash Central Railroad Corporation |
26 |
| Winamac Southern Railway Company |
52 |
