Ranking of Ohio Counties By Population with Unclassified Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 2.83M people in Ohio with Unclassified ancestry. Among all Ohio counties, Franklin County had the highest population with Unclassified ancestry (271.01K), followed by Cuyahoga County (193.58K), and Hamilton County (176.82K).
The chart and table below shows the top 10 counties with high number of people with Unclassified 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 Unclassified Ancestry in 2021
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| Rank | County | Population |
|---|---|---|
| 1 | Franklin County | 271011 |
| 2 | Cuyahoga County | 193576 |
| 3 | Hamilton County | 176819 |
| 4 | Montgomery County | 137561 |
| 5 | Summit County | 115077 |
| 6 | Butler County | 91574 |
| 7 | Lucas County | 90231 |
| 8 | Stark County | 85781 |
| 9 | Clermont County | 61465 |
| 10 | Licking County | 54720 |
| 11 | Warren County | 54640 |
| 12 | Lorain County | 53103 |
| 13 | Trumbull County | 45449 |
| 14 | Fairfield County | 43972 |
| 15 | Clark County | 43052 |
| 16 | Delaware County | 42959 |
| 17 | Greene County | 41514 |
| 18 | Lake County | 41304 |
| 19 | Mahoning County | 37524 |
| 20 | Richland County | 37422 |
| 21 | Wayne County | 36092 |
| 22 | Scioto County | 35803 |
| 23 | Portage County | 35585 |
| 24 | Medina County | 35365 |
| 25 | Miami County | 33242 |
| 26 | Muskingum County | 31549 |
| 27 | Columbiana County | 30022 |
| 28 | Ross County | 28403 |
| 29 | Lawrence County | 28088 |
| 30 | Wood County | 27910 |
| 31 | Tuscarawas County | 27597 |
| 32 | Allen County | 26533 |
| 33 | Knox County | 22601 |
| 34 | Belmont County | 21362 |
| 35 | Ashtabula County | 21273 |
| 36 | Washington County | 21253 |
| 37 | Pickaway County | 20547 |
| 38 | Jefferson County | 20363 |
| 39 | Marion County | 19950 |
| 40 | Athens County | 19918 |
| 41 | Darke County | 18651 |
| 42 | Geauga County | 18202 |
| 43 | Ashland County | 17567 |
| 44 | Highland County | 17113 |
| 45 | Logan County | 16876 |
| 46 | Erie County | 16661 |
| 47 | Brown County | 16600 |
| 48 | Jackson County | 16209 |
| 49 | Shelby County | 16100 |
| 50 | Huron County | 15947 |
| 51 | Hancock County | 15406 |
| 52 | Clinton County | 15037 |
| 53 | Preble County | 14803 |
| 54 | Seneca County | 13737 |
| 55 | Guernsey County | 13652 |
| 56 | Pike County | 13607 |
| 57 | Champaign County | 13228 |
| 58 | Sandusky County | 13207 |
| 59 | Perry County | 13023 |
| 60 | Morrow County | 12793 |
| 61 | Holmes County | 12784 |
| 62 | Adams County | 12583 |
| 63 | Gallia County | 12502 |
| 64 | Auglaize County | 12214 |
| 65 | Crawford County | 11808 |
| 66 | Union County | 11049 |
| 67 | Hocking County | 10764 |
| 68 | Williams County | 10728 |
| 69 | Coshocton County | 10525 |
| 70 | Fayette County | 10335 |
| 71 | Fulton County | 10247 |
| 72 | Van Wert County | 10215 |
| 73 | Defiance County | 10208 |
| 73 | Meigs County | 10208 |
| 74 | Hardin County | 10036 |
| 75 | Madison County | 9758 |
| 76 | Mercer County | 9326 |
| 77 | Ottawa County | 9179 |
| 78 | Carroll County | 7706 |
| 79 | Paulding County | 7131 |
| 80 | Putnam County | 6480 |
| 81 | Wyandot County | 6291 |
| 82 | Henry County | 6227 |
| 83 | Harrison County | 5634 |
| 84 | Vinton County | 5445 |
| 85 | Morgan County | 5333 |
| 86 | Monroe County | 5191 |
| 87 | Noble County | 4684 |
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