| | Forest County | PA | 42053 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=ForestCounty+PA |
| | Fayette County | PA | 42051 | | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=FayetteCounty+PA |
| | Erie County | PA | 42049 | | Erie, PA 21500 | Erie-Meadville, PA 240 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=ErieCounty+PA |
| | Elk County | PA | 42047 | | St. Marys, PA 41260 | | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=ElkCounty+PA |
| | Delaware County | PA | 42045 | Philadelphia, PA 37964 | Philadelphia-Camden-Wilmington,
PA-NJ-DE-MD 37980 | Philadelphia-Reading-Camden,
PA-NJ-DE-MD 428 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=DelawareCounty+PA |
| | Dauphin County | PA | 42043 | | Harrisburg-Carlisle, PA 25420 | Harrisburg-York-Lebanon,
PA 276 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=DauphinCounty+PA |
| | Cumberland County | PA | 42041 | | Harrisburg-Carlisle, PA 25420 | Harrisburg-York-Lebanon,
PA 276 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=CumberlandCounty+PA |
| | Crawford County | PA | 42039 | | Meadville, PA 32740 | Erie-Meadville, PA 240 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=CrawfordCounty+PA |
| | Columbia County | PA | 42037 | | Bloomsburg-Berwick, PA 14100 | Bloomsburg-Berwick-Sunbury,
PA 146 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=ColumbiaCounty+PA |
| | Clinton County | PA | 42035 | | Lock Haven, PA 30820 | Williamsport-Lock Haven,
PA 558 | Central | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=ClintonCounty+PA |