Cities of Washington County
- Allenport (2)
- Baidland (1)
- California (4)
- Canonsburg (4)
- Charleroi (5)
- Donora (6)
- Gastonville (2)
- Houston (4)
- McDonald (1)
- McGovern (4)
- McMurray (1)
- Meadow Lands (4)
- Monongahela (6)
- Muse (1)
- New Eagle (6)
- North Charleroi (4)
- Roscoe (2)
- Speers (3)
- Stockdale (2)
- Thompsonville (1)
- Washington (8)
- West Brownsville (4)
- Wickerham Manor-Fisher (6)
The number in parentheses indicates the number of routes.