Ranking of Ohio Counties By Percentage of 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 percentage of the population of Ohio (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 32.65%. Among all Ohio counties, Noble County had the highest percentage of its population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (51.90%), followed by Monroe County (49.98%), and Harrison County (49.74%).
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 Percentage of Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
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| Rank | County | Percentage of Population (Aged 25yrs+) (%) |
|---|---|---|
| 1 | Noble County | 51.90 |
| 2 | Monroe County | 49.98 |
| 3 | Harrison County | 49.74 |
| 4 | Hardin County | 49.64 |
| 5 | Carroll County | 47.88 |
| 5 | Perry County | 47.88 |
| 6 | Wyandot County | 46.77 |
| 7 | Pike County | 46.49 |
| 8 | Jackson County | 46.43 |
| 9 | Huron County | 46.39 |
| 10 | Crawford County | 46.25 |
| 11 | Belmont County | 46.19 |
| 12 | Darke County | 45.99 |
| 13 | Tuscarawas County | 45.86 |
| 14 | Meigs County | 45.77 |
| 15 | Brown County | 45.62 |
| 16 | Morrow County | 45.54 |
| 17 | Fayette County | 45.39 |
| 18 | Columbiana County | 45.13 |
| 19 | Morgan County | 45.12 |
| 20 | Paulding County | 44.95 |
| 21 | Henry County | 44.75 |
| 22 | Van Wert County | 44.72 |
| 23 | Champaign County | 44.68 |
| 24 | Logan County | 44.61 |
| 25 | Lawrence County | 44.58 |
| 26 | Seneca County | 44.51 |
| 27 | Preble County | 44.49 |
| 28 | Marion County | 44.31 |
| 29 | Trumbull County | 44.15 |
| 30 | Ross County | 44.11 |
| 31 | Mercer County | 43.81 |
| 32 | Jefferson County | 43.75 |
| 33 | Ashtabula County | 43.39 |
| 34 | Vinton County | 43.20 |
| 35 | Scioto County | 43.08 |
| 36 | Guernsey County | 42.96 |
| 37 | Williams County | 42.91 |
| 38 | Muskingum County | 42.74 |
| 39 | Coshocton County | 42.58 |
| 40 | Highland County | 42.46 |
| 41 | Fulton County | 42.36 |
| 42 | Hocking County | 42.30 |
| 43 | Auglaize County | 42.29 |
| 44 | Sandusky County | 42.26 |
| 45 | Adams County | 42.23 |
| 46 | Ashland County | 41.97 |
| 47 | Shelby County | 41.08 |
| 48 | Pickaway County | 40.98 |
| 49 | Richland County | 40.59 |
| 50 | Madison County | 40.57 |
| 51 | Gallia County | 40.52 |
| 52 | Allen County | 40.32 |
| 53 | Defiance County | 40.24 |
| 54 | Knox County | 39.74 |
| 55 | Putnam County | 39.64 |
| 56 | Washington County | 38.72 |
| 57 | Wayne County | 38.54 |
| 58 | Stark County | 38.17 |
| 59 | Clinton County | 38.09 |
| 60 | Miami County | 37.78 |
| 61 | Clark County | 37.57 |
| 62 | Mahoning County | 37.53 |
| 63 | Portage County | 36.80 |
| 64 | Hancock County | 35.87 |
| 65 | Ottawa County | 35.52 |
| 66 | Erie County | 35.49 |
| 67 | Licking County | 33.40 |
| 68 | Butler County | 32.61 |
| 69 | Fairfield County | 32.49 |
| 70 | Holmes County | 32.02 |
| 71 | Clermont County | 31.85 |
| 72 | Lake County | 31.32 |
| 73 | Athens County | 31.28 |
| 74 | Lorain County | 31.19 |
| 75 | Union County | 30.73 |
| 76 | Medina County | 30.33 |
| 77 | Lucas County | 29.78 |
| 78 | Summit County | 29.50 |
| 79 | Wood County | 29.28 |
| 80 | Montgomery County | 27.82 |
| 81 | Cuyahoga County | 27.34 |
| 82 | Hamilton County | 25.90 |
| 83 | Warren County | 25.82 |
| 84 | Geauga County | 25.52 |
| 85 | Franklin County | 24.00 |
| 86 | Greene County | 22.74 |
| 87 | Delaware County | 16.21 |
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