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