Sun Tran
 | |
 | |
| Parent | City of Tucson |
|---|---|
| Founded | 1969 |
| Headquarters | 3920 N. Sun Tran Blvd |
| Locale | Tucson, Arizona |
| Service type | Bus Streetcar Paratransit |
| Routes | 42 bus routes (29 regular & 13 express) 1 streetcar line |
| Stops | 2,200+ |
| Stations | 3 |
| Fleet | 189 buses 139 cutaway vans 8 streetcars |
Daily ridership | 56,500 (weekdays, Q2 2026) |
Annual ridership | 18,315,300 (2025) |
| Fuel type | Biodiesel, Biodiesel-Urea, CNG |
| Operator | Fixed-Route, Sun Link: Tucson Transit Management, (RATP Dev)/ Sun Shuttle: Total Transit, Ajo Transportation |
| Website | suntran |
Sun Tran is the public transit system serving the city of Tucson, Arizona. In 2025, the system had 18,315,300 rides, or about 56,500 per weekday as of the second quarter of 2026. 100% of the fleet utilizes clean-burning fuels, such as compressed natural gas (CNG), biodiesel, and hybrid technologies. In addition to more than 40 bus routes, the system also includes the Sun Link modern streetcar line.