| Transit agency | City | Vehicles operated directly | Website |
|---|---|---|---|
| Southeastern Pennsylvania Transportation Authority | Philadelphia | 1,668 | Official site |
| Pittsburgh Regional Transit | Pittsburgh | 553 | Official site |
| Susquehanna Regional Transportation Authority | Harrisburg | 147 | Official site |
| South Central Transit Authority | Lancaster | 105 | Official site |
| Erie Metropolitan Transit Authority | Erie | 81 | Official site |
| Westmoreland County Transit Authority | Greensburg | 76 | Official site |
| Area Transportation Authority of North Central PA | Johnsonburg | 70 | Official site |
| Lehigh and Northampton Transportation Authority | Allentown | 68 | Official site |
| Luzerne County Transportation Authority | Wilkes Barre | 66 | Official site |
| Endless Mountains Transportation Authority | Mansfield | 58 | Official site |
| County of Lackawanna Transit System | Scranton | 55 | Official site |
| Cambria County Transit Authority | Johnstown | 46 | Official site |
| Crawford Area Transportation Authority | Meadville | 46 | Official site |
| Schuylkill Transportation System | Pottsville | 40 | Official site |
| Centre Area Transportation Authority | State College | 39 | Official site |
| Wayne County | Honesdale | 35 | Official site |
| Monroe County Transportation Authority | Swiftwater | 34 | Official site |
| Beaver County Transit Authority | Rochester | 29 | Official site |
| County of Fayette | Uniontown | 29 | Official site |
| RIVER VALLEY TRANSIT AUTHORITY | Williamsport | 27 | Official site |
| Mercer County Regional Council of Governments | Sharon | 26 | Official site |
| New Castle Area Transit Authority | New Castle | 25 | Official site |
| County of Lebanon Transit Authority | Lebanon | 24 | Official site |
| Centre County | Bellefonte | 23 | Official site |
| Altoona Metro Transit | Altoona | 21 | Official site |
| Indiana County Transit Authority | Indiana | 21 | Official site |
| Pike County | Hawley | 17 | Official site |
| Forest County | Tionesta | 15 | Official site |
| Warren County Transit Authority | Warren | 14 | Official site |
| Greene County - PA | Waynesburg | 11 | Official site |
| Mid-County Transit Authority | Kittanning | 11 | Official site |
| Borough of Mt. Carmel | Mount Carmel | 0 | Official site |
| Borough of Pottstown | Pottstown | 0 | Official site |
| Butler Transit Authority | Butler | 0 | Official site |
| City of Hazleton | Hazleton | 0 | Official site |
| Clarion County | Shippenville | 0 | Official site |
| County of Butler | Butler | 0 | Official site |
| Mid Mon Valley Transit Authority | Charleroi | 0 | Official site |
| Pennsylvania Department of Transportation | Harrisburg | 0 | Official site |
| Somerset County | Somerset | 0 | Official site |
| Southwestern Pennsylvania Commission | Pittsburgh | 0 | Official site |
| Susquehanna County | Montrose | 0 | Official site |
| Washington County Transportation Authority | Washington | 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.