# Regional railroad

In the United States, a regional railroad is a railroad company that is not Class I but still has a substantial amount of traffic or trackage (and thus is not a short line railroad). The Association of American Railroads (AAR) has defined the lower bound as 350 miles (560 km) of track or $40 million in annual operating revenue. (The Class I threshold is $250 million, adjusted for inflation since 1991.)

## List of regional railroads

The following railroads were classified as regional by the AAR in 2007.
| Railroad | Mileage | Notes |
| Alabama and Gulf Coast Railway | 348 | Owned by Genesee & Wyoming |
| Alaska Railroad | 506 | Operates freight and passenger trains in the state of Alaska |
| Buffalo and Pittsburgh Railroad | 729 | Owned by Genesee & Wyoming. Operates in New York and Pennsylvania. |
| Central Maine and Quebec Railway | 481 | Purchased by Canadian Pacific Railway in 2020 |
| Central Oregon and Pacific Railroad | 389 | Owned by RailAmerica. Operates between Northern California and Eugene, Oregon. |
| Dakota, Minnesota and Eastern Railroad | 1100 | Purchased by Canadian Pacific Railway in 2008 |
| Dakota, Missouri Valley and Western Railroad | 523 | Operates over 360 miles of former Soo Line Railroad track in Montana and North Dakota |
| Elgin, Joliet and Eastern Railway | 164 | Purchased by Canadian National Railway in 2009 |
| Florida East Coast Railway | 386 | Owned by Grupo México. Operates in Florida. |
| Florida Gulf & Atlantic Railroad | 430 | A shortline railroad owned and operated by RailUSA in the Florida Panhandle |
| Great Lakes Central Railroad | 400 | Operates in Michigan |
| Indiana Rail Road | 155 | Runs over former Illinois Central Railroad trackage from Newton, Illinois, to Indianapolis, Indiana |
| Indiana and Ohio Railway | 560 | Owned and operated by Genesee & Wyoming. Operates in Ohio, southern Michigan, and parts of southeastern Indiana. |
| Iowa, Chicago and Eastern Railroad | 1361 | Purchased by Canadian Pacific Railway in 2008 |
| Iowa Interstate Railroad | 592 | Owned by Railroad Development Corporation of Pittsburgh, Pennsylvania. Operates in the central United States. |
| Kansas and Oklahoma Railroad | 869 | Operates in the Midwestern United States. Entirely located in Kansas and, despite its name, owns no trackage in Oklahoma. |
| Kyle Railroad | 554 | Owned by Genesee & Wyoming Inc. Runs from North Central Kansas into Eastern Colorado. |
| Missouri and Northern Arkansas Railroad | 583 | Owned by Genesee & Wyoming. Operates in the U.S. states of Missouri, Kansas, and Arkansas. |
| Montana Rail Link | 905 | Acquired by BNSF Railway in 2022 |
| Nebraska Kansas Colorado Railway | 509 | Operates in Southwestern Nebraska, Northern Kansas and Northeastern Colorado |
| New York, Susquehanna and Western Railway | 357 | Operates in New Jersey, New York, and Pennsylvania |
| Northern Plains Railroad | 344 | Operates in Minnesota and North Dakota |
| Paducah and Louisville Railway | 290 | Operates freight service between Paducah and Louisville, Kentucky |
| Pan Am Railways | 1165 | Purchased by CSX Transportation in 2020 |
| Pan Am Southern | 437 | Purchased by CSX Transportation in 2020 |
| Portland and Western Railroad | 587 | Owned by Genesee & Wyoming Inc. Operates in Oregon. |
| Providence and Worcester Railroad | 568 | Owned by Genesee & Wyoming Inc. Operates tracks in Rhode Island, Massachusetts, and Connecticut, as well as New York via trackage rights. |
| Reading Blue Mountain and Northern Railroad | 400 | Operates in eastern Pennsylvania |
| Red River Valley and Western Railroad | 575 | Operates in North Dakota and Minnesota |
| San Joaquin Valley Railroad | 351 | Owned by the Western Region Division of Genesee & Wyoming Inc. Operates several lines in California's Central Valley/San Joaquin Valley around Fresno and Bakersfield. |
| South Kansas and Oklahoma Railroad | 398 | Owned by Watco. Operates in Kansas, Oklahoma and Missouri. |
| Texas Northeastern Railroad | 665 | Operates in Texas |
| Texas Pacifico Transportation | 393 | Owned by Grupo México. Operates in West Texas. |
| Utah Railway | 430 | Owned by Genesee & Wyoming Inc. Operates in Utah and Colorado. |
| Wheeling and Lake Erie Railway | 878 | Provides freight service in northern Ohio and western Pennsylvania |
| Wisconsin and Southern Railroad | 837 | Owned and run by Watco with lines in southern Wisconsin and Northeastern Illinois |