Ranking of Ohio Counties By Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent in 2021 (ACS-5Yrs)
Updated on September 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the population of Ohio (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 2,636,855. Among all Ohio counties, Cuyahoga County had the highest population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (243,671), followed by Franklin County (210,885), and Hamilton County (144,656).
The chart below shows the top 10 Ohio counties, and the table below shows the ranking of all Ohio counties.
You can see similar information for other educational attainments.
You can also see similar information for other states and for the United States.
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Related Topics: Ohio ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of Ohio Counties By Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Cuyahoga County | 243671 |
| 2 | Franklin County | 210885 |
| 3 | Hamilton County | 144656 |
| 4 | Summit County | 112545 |
| 5 | Montgomery County | 102217 |
| 6 | Stark County | 100003 |
| 7 | Lucas County | 87399 |
| 8 | Butler County | 81168 |
| 9 | Lorain County | 67562 |
| 10 | Trumbull County | 63958 |
| 11 | Mahoning County | 61455 |
| 12 | Lake County | 52584 |
| 13 | Clermont County | 45879 |
| 14 | Warren County | 41882 |
| 15 | Licking County | 40183 |
| 16 | Portage County | 39039 |
| 17 | Medina County | 38679 |
| 18 | Richland County | 35288 |
| 19 | Clark County | 34950 |
| 20 | Fairfield County | 34603 |
| 21 | Columbiana County | 33268 |
| 22 | Ashtabula County | 29835 |
| 23 | Wayne County | 29573 |
| 24 | Tuscarawas County | 29489 |
| 25 | Miami County | 28342 |
| 26 | Allen County | 27706 |
| 27 | Greene County | 25627 |
| 28 | Muskingum County | 25262 |
| 29 | Ross County | 24130 |
| 30 | Wood County | 24066 |
| 31 | Belmont County | 22782 |
| 32 | Delaware County | 22603 |
| 33 | Scioto County | 22305 |
| 34 | Marion County | 20500 |
| 35 | Jefferson County | 20386 |
| 36 | Erie County | 19362 |
| 37 | Hancock County | 18514 |
| 38 | Huron County | 18481 |
| 39 | Lawrence County | 18369 |
| 40 | Sandusky County | 17511 |
| 41 | Geauga County | 16793 |
| 42 | Pickaway County | 16723 |
| 43 | Washington County | 16619 |
| 44 | Seneca County | 16611 |
| 45 | Knox County | 16274 |
| 46 | Darke County | 16249 |
| 47 | Ashland County | 14761 |
| 48 | Logan County | 14236 |
| 49 | Brown County | 13926 |
| 50 | Crawford County | 13680 |
| 51 | Auglaize County | 13260 |
| 52 | Shelby County | 13197 |
| 53 | Union County | 12840 |
| 54 | Madison County | 12839 |
| 54 | Preble County | 12839 |
| 55 | Highland County | 12527 |
| 56 | Fulton County | 12382 |
| 57 | Mercer County | 12167 |
| 58 | Champaign County | 12076 |
| 59 | Perry County | 11707 |
| 60 | Guernsey County | 11590 |
| 61 | Athens County | 11222 |
| 62 | Morrow County | 11114 |
| 63 | Williams County | 11082 |
| 64 | Ottawa County | 10823 |
| 65 | Clinton County | 10788 |
| 66 | Coshocton County | 10785 |
| 67 | Defiance County | 10508 |
| 68 | Jackson County | 10335 |
| 69 | Hardin County | 9325 |
| 70 | Carroll County | 9276 |
| 71 | Putnam County | 9078 |
| 72 | Fayette County | 8995 |
| 73 | Van Wert County | 8874 |
| 74 | Pike County | 8744 |
| 75 | Henry County | 8552 |
| 76 | Hocking County | 8434 |
| 77 | Holmes County | 8353 |
| 78 | Gallia County | 8163 |
| 79 | Adams County | 7934 |
| 80 | Meigs County | 7248 |
| 81 | Wyandot County | 7159 |
| 82 | Paulding County | 5847 |
| 83 | Noble County | 5592 |
| 84 | Harrison County | 5257 |
| 85 | Monroe County | 4908 |
| 86 | Morgan County | 4532 |
| 87 | Vinton County | 3914 |