Counties by Class Page Content¨ Denotes Home Rule Counties First Class Population of 1,500,000 or morePhiladelphia County¨ Second Class Population of 800,000 to 1,499,999Allegheny County¨ Second Class A (2-A) Population of 500,000 to 799,999Bucks CountyDelaware County¨Montgomery County Third Class Population of 210,000 to 499,999Berks County Chester County Cumberland County Dauphin County Erie County¨Lackawanna County¨Lancaster CountyLehigh County¨Luzerne County¨Northampton County¨Westmoreland CountyYork County Fourth Class Population of 145,000 to 209,999Beaver County Butler County Cambria County Centre County Fayette County Franklin County Monroe CountySchuylkill CountyWashington County Fifth Class Population of 90,000 to 144,999Adams CountyBlair County Lawrence CountyLebanon CountyLycoming CountyMercer CountyNorthumberland County Sixth Class Population of 45,000 to 89,999Armstrong County Bedford County Bradford CountyCarbon County Clarion County Clearfield CountyClinton County Columbia County Crawford County Elk County Greene County Huntingdon County Indiana County Jefferson CountyMcKean CountyMifflin CountyPerry CountyPike CountySomerset CountySusquehanna CountyTioga CountyVenango CountyWarren CountyWayne County Seventh Class Population of 20,000 to 44,999Juniata County Snyder CountyUnion CountyWyoming County Eighth Class Population of less than 20,000Cameron County Forest County Fulton CountyMontour CountyPotter CountySullivan County