| Transit agency | City | Vehicles operated directly | Website |
|---|---|---|---|
| Denver Regional Transportation District | Denver | 427 | Official site |
| Roaring Fork Transportation Authority | Glenwood Springs | 97 | Official site |
| Town of Mountain Village | Telluride | 75 | Official site |
| Northeastern Colorado Association of Local Governments | Fort Morgan | 60 | Official site |
| City of Fort Collins | Fort Collins | 32 | Official site |
| Summit County | Breckenridge | 31 | Official site |
| Town of Vail | Vail | 27 | Official site |
| Eagle County | Eagle | 25 | Official site |
| City of Steamboat Springs | Steamboat Springs | 24 | Official site |
| Greeley, City Of | Greeley | 24 | Official site |
| Town of Snowmass Village | Snowmass Village | 24 | Official site |
| North Front Range Transportation and Air Quality Planning Council | Fort Collins | 22 | Official site |
| City of Pueblo | Pueblo | 14 | Official site |
| Mountain Express | Crested Butte | 13 | Official site |
| City of Durango | Durango | 12 | Official site |
| Town of Breckenridge | Breckenridge | 11 | Official site |
| San Miguel Authority for Regional Transportation | Telluride | 8 | Official site |
| Town of Avon | Avon | 8 | Official site |
| City of Cripple Creek | Cripple Creek | 7 | Official site |
| City of Loveland, Colorado | Loveland | 7 | Official site |
| Dolores County | Dove Creek | 7 | Official site |
| Huerfano/Las Animas Area Council of Governments | Trinidad | 7 | Official site |
| Archuleta County | Pagosa Springs | 6 | Official site |
| Montezuma County | Cortez | 6 | Official site |
| City of Colorado Springs | Colorado Springs | 5 | Official site |
| Prowers County | Lamar | 5 | Official site |
| City of La Junta | La Junta | 4 | Official site |
| Clear Creek County | Georgetown | 3 | Official site |
| East Central Council of Local Governments | Stratton | 3 | Official site |
| Town of Telluride | Telluride | 2 | Official site |
| City of Burlington | Burlington | 1 | Official site |
| Town of Limon | Limon | 1 | Official site |
| City of Black Hawk | Black Hawk | 0 | Official site |
| City of Glenwood Springs | Glenwood Springs | 0 | Official site |
| County of Mesa | Grand Junction | 0 | Official site |
| Denver Regional Council of Governments | Denver | 0 | Official site |
| Gunnison Valley Rural Transportation Authority | Crested Butte | 0 | Official site |
| Town of Estes Park | Estes Park | 0 | Official site |
| Town of Winter Park | Winter Park | 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.