Millions of customers rely on SamTrans bus service each year to keep them on the move. Buses operate throughout San Mateo County and into parts of San Francisco and Palo Alto, a 446-square mile service area.
Monthly total and average weekday ridership numbers are included in each SamTrans Board of Directors monthly agenda packet, available online.
| Total Passengers | Fiscal Year 2021 | Fiscal Year 2022 | Fiscal Year 2023 | Fiscal Year 2024 | Fiscal Year 2025 | Fiscal Year 2026 |
| Bus | 4,503,358 | 6,956,853 | 8,528,698 | TBD | TBD | TBD |
| Paratransit | 121,394 | 171,130 | 202,425 | TBD | TBD | TBD |
| Total Passengers | Fiscal Year 2015 | Fiscal Year 2016 | Fiscal Year 2017 | Fiscal Year 2018 | Fiscal Year 2019 | Fiscal Year 2020 |
| Bus | 13,158,700 | 12,802,550 | 11,825,380 | 11,134,270 | 10,670,850 | 8,788,180 |
| Paratransit | 329,040 | 351,200 | 361,380 | 354,680 | 337,420 | 256,730 |