| Transit agency | City | Vehicles operated directly | Website |
|---|---|---|---|
| Town of Oro Valley | Oro Valley | 30 | Official site |
| Northern Arizona Intergovernmental Public Transportation Authority | Flagstaff | 22 | Official site |
| City of Glendale | Glendale | 18 | Official site |
| Hualapai Indian Tribe | Peach Springs | 18 | Official site |
| Navajo Nation | Fort Defiance | 18 | Official site |
| Hopi Tribe | Kykotsmovi Village | 17 | Official site |
| City of Bullhead | Bullhead City | 13 | Official site |
| San Carlos Apache Tribe | San Carlos | 10 | Official site |
| City of Cottonwood | Cottonwood | 9 | Official site |
| Kaibab Band of Paiute Indians | Fredonia | 9 | Official site |
| Salt River Pima-Maricopa Indian Community | Scottsdale | 9 | Official site |
| Yavapai-Apache Nation | Camp Verde | 9 | Official site |
| Ak-Chin Indian Community | Maricopa | 8 | — |
| City of Coolidge | Coolidge | 8 | Official site |
| City of Douglas | Douglas | 8 | Official site |
| City of Peoria | Peoria | 7 | Official site |
| City of Sierra Vista | Sierra Vista | 7 | Official site |
| Lake Havasu City | Lake Havasu City | 7 | Official site |
| City of Maricopa | Maricopa | 6 | Official site |
| City of Kingman | Kingman | 5 | Official site |
| Town of Miami | Miami | 5 | Official site |
| White Mountain Apache Tribe | Whiteriver | 5 | Official site |
| City of Sedona | Sedona | 4 | Official site |
| City of Benson | Benson | 3 | Official site |
| Town of Payson | Payson | 3 | Official site |
| Town of Quartzsite | Quartzsite | 3 | Official site |
| City of Winslow | Winslow | 2 | Official site |
| Gila River Indian Community | Sacaton | 2 | Official site |
| City Of Willcox | Willcox | 1 | Official site |
| City of Avondale | Avondale | 0 | Official site |
| City of Bisbee | Bisbee | 0 | Official site |
| City of Casa Grande | Casa Grande | 0 | Official site |
| City of Goodyear | Goodyear | 0 | Official site |
| City of Phoenix | Phoenix | 0 | Official site |
| City of Scottsdale | Scottsdale | 0 | Official site |
| City of Show Low | Show Low | 0 | Official site |
| City of Tucson | Tucson | 0 | Official site |
| Pima Association of Governments | Tucson | 0 | Official site |
| Regional Public Transportation Authority | Phoenix | 0 | Official site |
| Regional Transportation Authority of Pima County | Tucson | 0 | Official site |
| Town of Prescott Valley | Prescott Valley | 0 | Official site |
| Valley Metro Rail, Inc. | Phoenix | 0 | Official site |
| Yuma County Intergovernmental Public Transportation Authority | Yuma | 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.