Ranking of Ohio 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 2.00K people in Ohio with Celtic ancestry (0.02% of Ohio population). Among all Ohio counties, Madison County had the highest percentage of its population with Celtic ancestry (0.28%), followed by Clermont County (0.08%), and Lucas County (0.08%).

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 Ohio.

Data Source: US Census Bureau.
Ranking of Ohio Counties By Percentage of Population with Celtic Ancestry in 2021
Madison County
Clermont County
Lucas County
Sandusky County
Putnam County
Lake County
Morgan County
Butler County
Athens County
Belmont County
Ranking of Ohio Counties By Percentage of Population with Celtic Ancestry in 2021
0 of 0
Rank County Percentage of Pop. (%)
1 Madison County 0.28
2 Clermont County 0.08
2 Lucas County 0.08
2 Sandusky County 0.08
3 Putnam County 0.07
4 Lake County 0.05
4 Morgan County 0.05
5 Butler County 0.04
6 Athens County 0.03
7 Belmont County 0.02
7 Champaign County 0.02
7 Delaware County 0.02
7 Fairfield County 0.02
7 Greene County 0.02
7 Hamilton County 0.02
7 Hancock County 0.02
7 Jackson County 0.02
7 Medina County 0.02
7 Montgomery County 0.02
7 Muskingum County 0.02
7 Ross County 0.02
7 Scioto County 0.02
7 Summit County 0.02
7 Trumbull County 0.02
7 Van Wert County 0.02
7 Wood County 0.02
8 Adams County 0.01
8 Clark County 0.01
8 Cuyahoga County 0.01
8 Franklin County 0.01
8 Fulton County 0.01
8 Lawrence County 0.01
8 Logan County 0.01
8 Mahoning County 0.01
8 Pickaway County 0.01
8 Portage County 0.01
8 Richland County 0.01
8 Stark County 0.01
8 Warren County 0.01
8 Wayne County 0.01
9 Shelby County 0.004
10 Lorain County 0.003