| | 4231082 | Green Hills borough | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4233840 | Hendersonville CDP | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4234256 | Hickory CDP | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4235896 | Houston borough | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4238240 | Joffre CDP | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4240712 | Laboratory CDP | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4241376 | Langeloth CDP | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4241968 | Lawrence CDP | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4244512 | Long Branch borough | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |
| | 4247400 | Marianna borough | Washington County | PA | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | N |