Ranking of Pennsylvania Counties By Percentage of Population with Celtic Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 1.59K people in Pennsylvania with Celtic ancestry (0.01% of Pennsylvania population). Among all Pennsylvania counties, Clinton County had the highest percentage of its population with Celtic ancestry (0.04%), followed by Dauphin County (0.04%), and Cambria County (0.03%).

The chart and table below shows the top 10 counties with high percentage of its population having Celtic ancestry.

You can see similar information for other states and for other ancestry groups in Pennsylvania.

Data Source: US Census Bureau.
Ranking of Pennsylvania Counties By Percentage of Population with Celtic Ancestry in 2021
Clinton County
Dauphin County
Cambria County
Lebanon County
Lehigh County
McKean County
Venango County
Beaver County
Blair County
Bucks County
Ranking of Pennsylvania Counties By Percentage of Population with Celtic Ancestry in 2021
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Rank County Percentage of Pop. (%)
1 Clinton County 0.04
1 Dauphin County 0.04
2 Cambria County 0.03
2 Lebanon County 0.03
2 Lehigh County 0.03
2 McKean County 0.03
2 Venango County 0.03
3 Beaver County 0.02
3 Blair County 0.02
3 Bucks County 0.02
3 Centre County 0.02
3 Delaware County 0.02
3 Huntingdon County 0.02
3 Montgomery County 0.02
3 Philadelphia County 0.02
3 Schuylkill County 0.02
3 Somerset County 0.02
3 Westmoreland County 0.02
4 Adams County 0.01
4 Berks County 0.01
4 Chester County 0.01
4 Clarion County 0.01
4 Crawford County 0.01
4 Cumberland County 0.01
4 Erie County 0.01
4 Fayette County 0.01
4 Greene County 0.01
4 Lackawanna County 0.01
4 Lancaster County 0.01
4 Luzerne County 0.01
4 Mercer County 0.01
4 Perry County 0.01
4 Tioga County 0.01
5 Allegheny County 0.004
5 Butler County 0.004
5 Indiana County 0.004
5 York County 0.004
6 Washington County 0.001