| Transit agency | City | Vehicles operated directly | Website |
|---|---|---|---|
| Missoula Urban Transportation District | Missoula | 37 | Official site |
| City of Billings | Billings | 27 | Official site |
| Great Falls Transit District | Great Falls | 24 | Official site |
| Confederated Salish and Kootenai Tribes | Pablo | 20 | Official site |
| Flathead County | Kalispell | 14 | Official site |
| Blackfeet Nation | Browning | 13 | Official site |
| Helena, City of | Helena | 13 | Official site |
| Silver Bow County | Butte | 12 | Official site |
| Fort Peck Tribes | Wolf Point | 10 | Official site |
| Richland County | Sidney | 9 | Official site |
| Phillips Transit Authority | Malta | 7 | — |
| Powder River County | Broadus | 7 | Official site |
| Toole County | Shelby | 7 | Official site |
| Urban Transportation District of Dawson County | Glendive | 7 | Official site |
| Custer County | Miles City | 5 | Official site |
| University of Montana | Missoula | 5 | Official site |
| Valley County | Glasgow | 5 | Official site |
| Crow Tribe of Indians | Crow Agency | 4 | Official site |
| Fallon County | Baker | 4 | Official site |
| Garfield County | Jordan | 4 | Official site |
| Powell County | Deer Lodge | 4 | Official site |
| Chippewa Cree Tribe | Box Elder | 3 | Official site |
| Liberty County | Chester | 3 | Official site |
| Carter County | Ekalaka | 2 | Official site |
| City of Dillon | Dillon | 2 | Official site |
| Fort Belknap Indian Community | Harlem | 2 | Official site |
| Northern Cheyenne Tribe | Lame Deer | 2 | — |
| Park County | Livingston | 2 | Official site |
| City of Laurel | Laurel | 1 | Official site |
| Big Sky Transportation District | Big Sky | 0 | Official site |
Largest first by vehicles operated directly, as each employer reports it to its federal registry.
Source: Federal Transit Administration, National Transit Database 2024 — Reporter Agency Information. Data captured September 30, 2026.