Ranking of Oregon 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 463.72K people in Oregon with Irish ancestry. Among all Oregon counties, Multnomah County had the highest population with Irish ancestry (87.98K), followed by Washington County (55.63K), and Lane County (52.29K).

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 Oregon.

Data Source: US Census Bureau.
Ranking of Oregon Counties By Population with Irish Ancestry in 2021
Multnomah County
Washington County
Lane County
Clackamas County
Marion County
Jackson County
Deschutes County
Douglas County
Linn County
Yamhill County
Ranking of Oregon Counties By Population with Irish Ancestry in 2021
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Rank County Population
1 Multnomah County 87975
2 Washington County 55629
3 Lane County 52289
4 Clackamas County 46254
5 Marion County 30807
6 Jackson County 27766
7 Deschutes County 27364
8 Douglas County 14260
9 Linn County 13531
10 Yamhill County 12021
11 Josephine County 11853
12 Benton County 10555
13 Polk County 8019
14 Coos County 7703
15 Klamath County 7609
16 Umatilla County 6498
17 Columbia County 6157
18 Lincoln County 6009
19 Clatsop County 4719
20 Tillamook County 3471
21 Curry County 3400
22 Malheur County 2568
23 Union County 2557
24 Crook County 2514
25 Wasco County 2475
26 Jefferson County 1786
27 Hood River County 1757
28 Baker County 1452
29 Lake County 1131
30 Morrow County 1065
31 Harney County 747
32 Wallowa County 650
33 Grant County 478
34 Gilliam County 270
35 Wheeler County 227
36 Sherman County 152