Ranking of Washington Counties By Population with Irish Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 767.54K people in Washington with Irish ancestry. Among all Washington counties, King County had the highest population with Irish ancestry (197.34K), followed by Pierce County (93.41K), and Snohomish County (80.56K).

The chart and table below shows the top 10 counties with high number of people with Irish ancestry.

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

You may also be interested in:
Ranking of Washington Counties By Percentage of Population with Irish Ancestry in 2021

Related Topics: Washington ACS-5Yrs Estimates, 2021 Topic List.

Data Source: US Census Bureau.

Ranking of Washington Counties By Population with Irish Ancestry in 2021

King County

Pierce County

Snohomish County

Spokane County

Clark County

Kitsap County

Thurston County

Whatcom County

Benton County

Cowlitz County

Ranking of Washington Counties By Population with Irish Ancestry in 2021

0 of 0

Rank	County	Population
1	King County	197335
2	Pierce County	93412
3	Snohomish County	80560
4	Spokane County	71773
5	Clark County	52184
6	Kitsap County	35845
7	Thurston County	35763
8	Whatcom County	22171
9	Benton County	21399
10	Cowlitz County	14658
11	Yakima County	14115
12	Skagit County	13162
13	Lewis County	10525
14	Island County	10505
15	Grays Harbor County	9286
16	Clallam County	8854
17	Mason County	7950
18	Chelan County	6866
19	Walla Walla County	6318
20	Stevens County	5303
21	Grant County	5175
22	Okanogan County	4899
23	Whitman County	4867
24	Franklin County	4837
25	Jefferson County	4689
26	Kittitas County	4505
27	Douglas County	3991
28	Klickitat County	2861
29	Asotin County	2453
30	Pacific County	2327
31	San Juan County	2320
32	Skamania County	1455
33	Pend Oreille County	1392
34	Ferry County	1082
35	Lincoln County	888
36	Adams County	772
37	Columbia County	391
38	Garfield County	329
39	Wahkiakum County	326