| | 4200104 | Aaronsburg CDP | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4200988 | Allenport borough | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4203472 | Atlasburg CDP | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4203616 | Avella CDP | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4203768 | Baidland CDP | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4204568 | Beallsville borough | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4205672 | Bentleyville borough | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4210128 | Bulger CDP | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4210224 | Burgettstown borough | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4210768 | California borough | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |