Ranking of Indiana 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 701.02K people in Indiana with Irish ancestry. Among all Indiana counties, Marion County had the highest population with Irish ancestry (81.69K), followed by Lake County (51.15K), and Hamilton County (41.61K).
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 Indiana.
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Related Topics: Indiana ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of Indiana Counties By Population with Irish Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Marion County | 81687 |
| 2 | Lake County | 51152 |
| 3 | Hamilton County | 41609 |
| 4 | Allen County | 36470 |
| 5 | St. Joseph County | 33186 |
| 6 | Porter County | 25639 |
| 7 | Vanderburgh County | 19666 |
| 8 | Tippecanoe County | 18472 |
| 9 | Hendricks County | 17227 |
| 10 | Clark County | 16848 |
| 11 | Johnson County | 16534 |
| 12 | Monroe County | 16071 |
| 13 | Elkhart County | 15404 |
| 14 | LaPorte County | 15392 |
| 15 | Delaware County | 13063 |
| 16 | Madison County | 12332 |
| 17 | Vigo County | 11902 |
| 18 | Floyd County | 10593 |
| 19 | Hancock County | 9492 |
| 20 | Warrick County | 8912 |
| 21 | Kosciusko County | 8908 |
| 22 | Wayne County | 7904 |
| 23 | Bartholomew County | 7252 |
| 24 | Morgan County | 7239 |
| 25 | Howard County | 7211 |
| 26 | Boone County | 6884 |
| 27 | Dearborn County | 6833 |
| 28 | Grant County | 5779 |
| 29 | Lawrence County | 5294 |
| 30 | Henry County | 5280 |
| 31 | Montgomery County | 5214 |
| 32 | Huntington County | 4555 |
| 33 | Dubois County | 4250 |
| 34 | Jasper County | 4117 |
| 35 | Jackson County | 4051 |
| 36 | DeKalb County | 3956 |
| 37 | Noble County | 3863 |
| 38 | Harrison County | 3856 |
| 39 | Gibson County | 3797 |
| 40 | Shelby County | 3784 |
| 41 | Wabash County | 3738 |
| 42 | Steuben County | 3714 |
| 43 | Marshall County | 3684 |
| 44 | Jefferson County | 3626 |
| 45 | Miami County | 3618 |
| 46 | Jennings County | 3347 |
| 47 | Cass County | 3303 |
| 48 | Knox County | 3278 |
| 49 | Greene County | 3240 |
| 50 | Daviess County | 3233 |
| 51 | Perry County | 2949 |
| 52 | Whitley County | 2921 |
| 53 | Starke County | 2905 |
| 54 | Ripley County | 2877 |
| 55 | Putnam County | 2854 |
| 56 | Decatur County | 2767 |
| 57 | Posey County | 2760 |
| 58 | White County | 2738 |
| 59 | Washington County | 2728 |
| 60 | Randolph County | 2713 |
| 61 | Newton County | 2612 |
| 62 | Owen County | 2553 |
| 63 | Fayette County | 2503 |
| 64 | Scott County | 2426 |
| 65 | Sullivan County | 2308 |
| 66 | Clay County | 2240 |
| 67 | Adams County | 2229 |
| 68 | Franklin County | 2200 |
| 69 | Clinton County | 2160 |
| 70 | Rush County | 2082 |
| 71 | Fountain County | 2080 |
| 72 | Carroll County | 2028 |
| 73 | Orange County | 2006 |
| 74 | Spencer County | 1885 |
| 75 | Wells County | 1847 |
| 76 | Fulton County | 1815 |
| 77 | Blackford County | 1814 |
| 78 | LaGrange County | 1759 |
| 79 | Vermillion County | 1726 |
| 80 | Jay County | 1708 |
| 81 | Tipton County | 1618 |
| 82 | Brown County | 1588 |
| 83 | Pulaski County | 1562 |
| 84 | Parke County | 1543 |
| 85 | Pike County | 1372 |
| 86 | Crawford County | 1223 |
| 87 | Martin County | 1198 |
| 88 | Benton County | 1194 |
| 89 | Switzerland County | 1055 |
| 90 | Warren County | 717 |
| 91 | Ohio County | 679 |
| 92 | Union County | 617 |
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