| Train Dispatchers American Train Dispatchers | | Cleveland, OH | 2,718 |
| Train Dispatchers System Committee | Burlington Northern Rr | Paradise, TX | 757 |
| Train Dispatchers System Committee | Csx | Florence, SC | 336 |
| Train Dispatchers System Committee | Norfolk Southern | Bridgeville, PA | 336 |
| Train Dispatchers System Committee | Amtrak | Clifton Heights, PA | 203 |
| Train Dispatchers System Committee | Gca Csxt-east System Committee | Mechanicville, NY | 129 |
| Train Dispatchers System Committee | Mrl | Missoula, MT | 76 |
| Train Dispatchers System Committee | Scom Mbcr | Dedham, MA | 75 |
| Train Dispatchers System Committee | Louisiana & Arkansas Rr | Olathe, KS | 58 |
| Train Dispatchers System Committee | New Jersey Rail Transit | Fairless Hills, PA | 48 |
| Train Dispatchers System Committee | New York Chicago & St Louis Rr | Fort Wayne, IN | 46 |
| Train Dispatchers System Committee | Kiamichi System Committee | Sawyer, OK | 46 |
| Train Dispatchers System Committee | Norfolk & Western Railway | Decatur, IL | 41 |
| Train Dispatchers System Committee | Soo Line | Eagan, MN | 36 |
| Train Dispatchers System Committee | Northeast Illinois Regional Commute | Chicago, IL | 34 |
| Train Dispatchers System Committee | Conrail System | Whiting, NJ | 24 |
| Train Dispatchers System Committee | Indiana Harbor Belt Rr System Comm | Demotte, IN | 20 |
| Train Dispatchers System Committee | Indiana Harbor Belt Railway | Portage, IN | 18 |
| Train Dispatchers System Committee | N J Transit Power Supervisors | Pine Bush, NY | 16 |
| Train Dispatchers System Committee | Grand Trunk Western Rr | Waterford, MI | 14 |
| Train Dispatchers System Committee | Belt Rr Of Chicago | Tinley Park, IL | 13 |
| Train Dispatchers System Committee | Alaska Rr | Anchorage, AK | 11 |
| Train Dispatchers System Committee | Terminal Rr Asn Of Saint Louis | Wood River, IL | 11 |
| Train Dispatchers System Committee | Chicago South Shore-south Bend | Michigan City, IN | 6 |
| Train Dispatchers System Committee | Peoria & Pekin Union Railroad | Creve Coeur, IL | 5 |
| Train Dispatchers System Committee | Southern Railway Co | Morris, AL | 0 |
| Train Dispatchers System Committee | Duluth Missabe & Iron Range | Cleveland, OH | 0 |
| Train Dispatchers System Committee | Trans-hudson Port Authority | Red Bank, NJ | 0 |
