Ranking of Wisconsin Counties By Percentage of Population with Irish Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 614.20K people in Wisconsin with Irish ancestry (10.46% of Wisconsin population). Among all Wisconsin counties, Crawford County had the highest percentage of its population with Irish ancestry (16.78%), followed by Iowa County (15.33%), and Lafayette County (15.08%).
The chart and table below shows the top 10 counties with high percentage of its population having Irish ancestry.
You can see similar information for other states and for other ancestry groups in Wisconsin.
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Related Topics: Wisconsin ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of Wisconsin Counties By Percentage of Population with Irish Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Crawford County | 16.78 |
| 2 | Iowa County | 15.33 |
| 3 | Lafayette County | 15.08 |
| 4 | La Crosse County | 14.18 |
| 5 | Richland County | 14.17 |
| 6 | Walworth County | 13.74 |
| 7 | Rock County | 13.66 |
| 8 | Pierce County | 13.62 |
| 9 | Marquette County | 12.97 |
| 10 | Grant County | 12.93 |
| 11 | Sauk County | 12.92 |
| 12 | Dane County | 12.89 |
| 13 | Waukesha County | 12.86 |
| 14 | Juneau County | 12.73 |
| 15 | Columbia County | 12.58 |
| 16 | Green County | 12.42 |
| 17 | Oneida County | 12.33 |
| 18 | Washburn County | 12.25 |
| 19 | Florence County | 12.09 |
| 20 | Iron County | 11.90 |
| 21 | Forest County | 11.80 |
| 22 | Adams County | 11.79 |
| 23 | Jefferson County | 11.53 |
| 24 | Ozaukee County | 11.41 |
| 25 | St. Croix County | 11.15 |
| 26 | Dunn County | 11.08 |
| 27 | Fond du Lac County | 11.03 |
| 27 | Kenosha County | 11.03 |
| 28 | Chippewa County | 11.01 |
| 29 | Washington County | 10.91 |
| 30 | Monroe County | 10.72 |
| 31 | Douglas County | 10.65 |
| 32 | Vilas County | 10.63 |
| 33 | Green Lake County | 10.43 |
| 34 | Eau Claire County | 10.42 |
| 35 | Vernon County | 10.25 |
| 36 | Winnebago County | 10.21 |
| 37 | Bayfield County | 10.12 |
| 38 | Jackson County | 10.06 |
| 39 | Portage County | 9.99 |
| 40 | Rusk County | 9.95 |
| 41 | Racine County | 9.94 |
| 42 | Polk County | 9.91 |
| 43 | Door County | 9.87 |
| 44 | Brown County | 9.85 |
| 45 | Price County | 9.78 |
| 46 | Dodge County | 9.74 |
| 47 | Sawyer County | 9.64 |
| 48 | Waupaca County | 9.63 |
| 49 | Outagamie County | 9.57 |
| 50 | Waushara County | 9.35 |
| 51 | Wood County | 9.25 |
| 52 | Oconto County | 8.94 |
| 53 | Langlade County | 8.74 |
| 54 | Lincoln County | 8.67 |
| 55 | Manitowoc County | 8.62 |
| 56 | Ashland County | 8.42 |
| 57 | Barron County | 8.35 |
| 58 | Calumet County | 8.29 |
| 59 | Burnett County | 8.27 |
| 60 | Marinette County | 8.24 |
| 61 | Sheboygan County | 8.23 |
| 62 | Pepin County | 7.98 |
| 63 | Milwaukee County | 7.69 |
| 64 | Trempealeau County | 7.59 |
| 65 | Marathon County | 7.54 |
| 66 | Kewaunee County | 6.96 |
| 67 | Buffalo County | 6.92 |
| 68 | Taylor County | 6.82 |
| 69 | Shawano County | 6.41 |
| 70 | Clark County | 6.38 |
| 71 | Menominee County | 0.56 |
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