Ranking of Pennsylvania Counties By 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. Among all Pennsylvania counties, Philadelphia County had the highest population with Celtic ancestry (241), followed by Montgomery County (154), and Bucks County (120).

The chart and table below shows the top 10 counties with high number of people with 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 Population with Celtic Ancestry in 2021
Philadelphia County
Montgomery County
Bucks County
Lehigh County
Dauphin County
Delaware County
Westmoreland County
Chester County
Berks County
Lancaster County
Ranking of Pennsylvania Counties By Population with Celtic Ancestry in 2021
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Rank County Population
1 Philadelphia County 241
2 Montgomery County 154
3 Bucks County 120
4 Lehigh County 109
5 Dauphin County 106
6 Delaware County 86
7 Westmoreland County 83
8 Chester County 66
9 Berks County 55
10 Lancaster County 54
11 Luzerne County 47
12 Allegheny County 46
13 Cambria County 38
13 Lebanon County 38
14 Centre County 33
15 Schuylkill County 32
16 Erie County 31
17 Blair County 30
18 Beaver County 26
19 Lackawanna County 21
20 York County 20
21 Clinton County 16
22 Somerset County 15
22 Venango County 15
23 Fayette County 14
23 Mercer County 14
24 Cumberland County 13
24 McKean County 13
25 Adams County 11
26 Crawford County 10
27 Huntingdon County 8
28 Butler County 7
29 Clarion County 4
30 Greene County 3
30 Indiana County 3
30 Perry County 3
31 Tioga County 2
31 Washington County 2