| | | Juniata County | PA | 42067 | | | | | nonmetro county (rural) | manufacturing-dependent | https://maps.google.com/?q=JuniataCounty+PA |
| | | Lackawanna County | PA | 42069 | | Scranton--Wilkes-Barre,
PA 42540 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=LackawannaCounty+PA |
| | | Lancaster County | PA | 42071 | | Lancaster, PA 29540 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=LancasterCounty+PA |
| | | Lawrence County | PA | 42073 | | Pittsburgh, PA 38300 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | Outlying | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=LawrenceCounty+Pennsylvania |
| | | Lebanon County | PA | 42075 | | Lebanon, PA 30140 | Harrisburg-York-Lebanon,
PA 276 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=LebanonCounty+PA |
| | | Lehigh County | PA | 42077 | | Allentown-Bethlehem-Easton,
PA-NJ 10900 | Allentown-Bethlehem-East
Stroudsburg, PA-NJ 106 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=LehighCounty+PA |
| | | Luzerne County | PA | 42079 | | Scranton--Wilkes-Barre,
PA 42540 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=LuzerneCounty+PA |
| | | Lycoming County | PA | 42081 | | Williamsport, PA 48700 | Williamsport-Lock Haven,
PA 558 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=LycomingCounty+PA |
| | | McKean County | PA | 42083 | | Bradford, PA 14620 | | Central | nonmetro county (rural) | mining-dependent | https://maps.google.com/?q=McKeanCounty+PA |
| | | Mercer County | PA | 42085 | | Hermitage, PA 25850 | Pittsburgh-Weirton-Steubenville,
PA-OH-WV 430 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=MercerCounty+PA |
