Genealogy research online has made leaps and bounds over the last decade. The variety of freely available census information varies greatly on the availability of census indices online.
- Adams County, Pennsylvania Census
- Allegheny County, Pennsylvania Census
- Armstrong County, Pennsylvania Census
- Beaver County, Pennsylvania Census
- Bedford County, Pennsylvania Census
- Berks County, Pennsylvania Census
- Blair County, Pennsylvania Census
- Bradford County, Pennsylvania Census
- Bucks County, Pennsylvania Census
- Butler County, Pennsylvania Census
- Cambria County, Pennsylvania Census
- Cameron County, Pennsylvania Census
- Carbon County, Pennsylvania Census
- Centre County, Pennsylvania Census
- Chester County, Pennsylvania Census
- Clarion County, Pennsylvania Census
- Clearfield County, Pennsylvania Census
- Clinton County, Pennsylvania Census
- Columbia County, Pennsylvania Census
- Crawford County, Pennsylvania Census
- Cumberland County, Pennsylvania Census
- Dauphin County, Pennsylvania Census
- Delaware County, Pennsylvania Census
- Elk County, Pennsylvania Census
- Erie County, Pennsylvania Census
- Fayette County, Pennsylvania Census
- Forest County, Pennsylvania Census
- Franklin County, Pennsylvania Census
- Fulton County, Pennsylvania Census
- Greene County, Pennsylvania Census
- Huntingdon County, Pennsylvania Census
- Indiana County, Pennsylvania Census
- Jefferson County, Pennsylvania Census
- Juniata County, Pennsylvania Census
- Lackawanna County, Pennsylvania Census
- Lancaster County, Pennsylvania Census
- Lawrence County, Pennsylvania Census
- Lebanon County, Pennsylvania Census
- Lehigh County, Pennsylvania Census
- Luzerne County, Pennsylvania Census
- Lycoming County, Pennsylvania Census
- McKean County, Pennsylvania Census
- Mercer County, Pennsylvania Census
- Mifflin County, Pennsylvania Census
- Monroe County, Pennsylvania Census
- Montgomery County, Pennsylvania Census
- Montour County, Pennsylvania Census
- Northampton County, Pennsylvania Census
- Northumberland County, Pennsylvania Census
- Perry County, Pennsylvania Census
- Philadelphia County, Pennsylvania Census
- Pike County, Pennsylvania Census
- Potter County, Pennsylvania Census
- Schuylkill County, Pennsylvania Census
- Snyder County, Pennsylvania Census
- Somerset County, Pennsylvania Census
- Sullivan County, Pennsylvania Census
- Susquehanna County, Pennsylvania Census
- Tioga County, Pennsylvania Census
- Union County, Pennsylvania Census
- Venango County, Pennsylvania Census
- Warren County, Pennsylvania Census
- Washington County, Pennsylvania Census
- Wayne County, Pennsylvania Census
- Westmoreland County, Pennsylvania Census
- Wyoming County, Pennsylvania Census
- York County, Pennsylvania Census