Ranking of Ohio 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 1.49M people in Ohio with Irish ancestry. Among all Ohio counties, Franklin County had the highest population with Irish ancestry (154.54K), followed by Cuyahoga County (148.44K), and Hamilton County (101.78K).
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 Ohio.
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Related Topics: Ohio ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of Ohio Counties By Population with Irish Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Franklin County | 154540 |
| 2 | Cuyahoga County | 148444 |
| 3 | Hamilton County | 101777 |
| 4 | Summit County | 71642 |
| 5 | Montgomery County | 60810 |
| 6 | Stark County | 52601 |
| 7 | Lucas County | 49781 |
| 8 | Lorain County | 44848 |
| 9 | Butler County | 44809 |
| 10 | Lake County | 41713 |
| 11 | Warren County | 33325 |
| 12 | Mahoning County | 33145 |
| 13 | Delaware County | 32490 |
| 14 | Medina County | 30669 |
| 15 | Clermont County | 29247 |
| 16 | Licking County | 25606 |
| 17 | Portage County | 24387 |
| 18 | Greene County | 22194 |
| 19 | Trumbull County | 21110 |
| 20 | Fairfield County | 20147 |
| 21 | Clark County | 18663 |
| 22 | Wood County | 17562 |
| 23 | Columbiana County | 16779 |
| 24 | Geauga County | 13342 |
| 25 | Ashtabula County | 12970 |
| 26 | Richland County | 12740 |
| 27 | Allen County | 12610 |
| 28 | Miami County | 12520 |
| 29 | Wayne County | 11718 |
| 30 | Tuscarawas County | 11394 |
| 31 | Muskingum County | 11042 |
| 32 | Erie County | 10654 |
| 33 | Jefferson County | 10372 |
| 34 | Belmont County | 9638 |
| 35 | Athens County | 9069 |
| 36 | Ross County | 8898 |
| 37 | Union County | 8779 |
| 38 | Knox County | 8505 |
| 39 | Scioto County | 8479 |
| 40 | Hancock County | 7728 |
| 41 | Pickaway County | 7530 |
| 42 | Marion County | 7522 |
| 43 | Washington County | 7391 |
| 44 | Huron County | 7279 |
| 45 | Seneca County | 7079 |
| 46 | Madison County | 6828 |
| 47 | Lawrence County | 6650 |
| 48 | Sandusky County | 6310 |
| 49 | Fulton County | 6157 |
| 50 | Champaign County | 5906 |
| 51 | Guernsey County | 5682 |
| 52 | Clinton County | 5598 |
| 53 | Perry County | 5546 |
| 54 | Ashland County | 5447 |
| 55 | Logan County | 5422 |
| 56 | Crawford County | 5318 |
| 57 | Brown County | 5157 |
| 58 | Highland County | 5148 |
| 59 | Auglaize County | 5112 |
| 60 | Shelby County | 5057 |
| 61 | Darke County | 4945 |
| 62 | Coshocton County | 4897 |
| 63 | Ottawa County | 4740 |
| 64 | Williams County | 4226 |
| 65 | Defiance County | 4118 |
| 66 | Carroll County | 4027 |
| 67 | Preble County | 4015 |
| 68 | Hocking County | 3784 |
| 69 | Gallia County | 3657 |
| 70 | Jackson County | 3656 |
| 71 | Mercer County | 3655 |
| 72 | Morrow County | 3643 |
| 73 | Hardin County | 3588 |
| 74 | Fayette County | 3174 |
| 75 | Henry County | 2982 |
| 76 | Adams County | 2879 |
| 77 | Meigs County | 2694 |
| 78 | Pike County | 2530 |
| 79 | Putnam County | 2509 |
| 80 | Wyandot County | 2486 |
| 81 | Van Wert County | 2062 |
| 82 | Holmes County | 1917 |
| 83 | Noble County | 1798 |
| 84 | Morgan County | 1741 |
| 85 | Paulding County | 1726 |
| 86 | Harrison County | 1702 |
| 87 | Monroe County | 1534 |
| 88 | Vinton County | 1429 |
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