Ranking of Washington 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 2.20K people in Washington with Celtic ancestry (0.03% of Washington population). Among all Washington counties, Chelan County had the highest percentage of its population with Celtic ancestry (0.07%), followed by Whatcom County (0.07%), and Douglas County (0.06%).

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 Washington.

Data Source: US Census Bureau.
Ranking of Washington Counties By Percentage of Population with Celtic Ancestry in 2021
Chelan County
Whatcom County
Douglas County
Jefferson County
Mason County
Thurston County
Cowlitz County
Pierce County
Skamania County
Grays Harbor County
Ranking of Washington Counties By Percentage of Population with Celtic Ancestry in 2021
0 of 0
Rank County Percentage of Pop. (%)
1 Chelan County 0.07
1 Whatcom County 0.07
2 Douglas County 0.06
3 Jefferson County 0.05
3 Mason County 0.05
3 Thurston County 0.05
4 Cowlitz County 0.04
4 Pierce County 0.04
4 Skamania County 0.04
5 Grays Harbor County 0.03
5 King County 0.03
5 Okanogan County 0.03
5 San Juan County 0.03
5 Skagit County 0.03
5 Snohomish County 0.03
5 Spokane County 0.03
5 Whitman County 0.03
6 Clark County 0.02
6 Kitsap County 0.02
6 Kittitas County 0.02
6 Walla Walla County 0.02
7 Benton County 0.01
7 Yakima County 0.01