Ranking of Ohio Counties By Population Aged 25 years and above with an Educational attainment of Less than High School Diploma 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 Less than High School Diploma was 715,751. Among all Ohio counties, Cuyahoga County had the highest population (aged 25 years and above) with an educational attainment of Less than High School Diploma (82,746), followed by Franklin County (75,031), and Hamilton County (45,008).
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 Less than High School Diploma in 2021
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| Rank | County | Number of People |
|---|---|---|
| 1 | Cuyahoga County | 82746 |
| 2 | Franklin County | 75031 |
| 3 | Hamilton County | 45008 |
| 4 | Montgomery County | 32966 |
| 5 | Lucas County | 28873 |
| 6 | Summit County | 28145 |
| 7 | Butler County | 21101 |
| 8 | Stark County | 20179 |
| 9 | Lorain County | 19710 |
| 10 | Trumbull County | 15628 |
| 11 | Mahoning County | 14030 |
| 12 | Clermont County | 13619 |
| 13 | Lake County | 11693 |
| 14 | Holmes County | 11332 |
| 15 | Wayne County | 10680 |
| 16 | Clark County | 10474 |
| 17 | Richland County | 10043 |
| 18 | Ashtabula County | 9356 |
| 19 | Warren County | 8757 |
| 20 | Licking County | 8626 |
| 21 | Portage County | 8067 |
| 22 | Columbiana County | 7732 |
| 23 | Tuscarawas County | 7479 |
| 24 | Scioto County | 7256 |
| 25 | Fairfield County | 6869 |
| 26 | Greene County | 6735 |
| 27 | Medina County | 6291 |
| 28 | Geauga County | 6193 |
| 29 | Ross County | 6134 |
| 30 | Allen County | 6084 |
| 31 | Muskingum County | 6015 |
| 32 | Pickaway County | 5228 |
| 33 | Miami County | 5114 |
| 34 | Highland County | 4801 |
| 35 | Marion County | 4656 |
| 36 | Lawrence County | 4554 |
| 37 | Erie County | 4419 |
| 38 | Belmont County | 4181 |
| 39 | Wood County | 4142 |
| 40 | Brown County | 4053 |
| 41 | Huron County | 4002 |
| 42 | Coshocton County | 3981 |
| 43 | Delaware County | 3893 |
| 44 | Guernsey County | 3813 |
| 45 | Washington County | 3691 |
| 46 | Madison County | 3686 |
| 47 | Ashland County | 3628 |
| 48 | Jefferson County | 3394 |
| 49 | Hancock County | 3385 |
| 50 | Knox County | 3382 |
| 51 | Shelby County | 3334 |
| 52 | Athens County | 3259 |
| 53 | Fayette County | 3122 |
| 54 | Darke County | 3085 |
| 55 | Sandusky County | 3069 |
| 56 | Adams County | 3068 |
| 57 | Gallia County | 3004 |
| 58 | Crawford County | 2948 |
| 59 | Pike County | 2798 |
| 60 | Jackson County | 2794 |
| 61 | Perry County | 2729 |
| 62 | Morrow County | 2694 |
| 63 | Seneca County | 2605 |
| 64 | Preble County | 2495 |
| 65 | Clinton County | 2490 |
| 66 | Champaign County | 2381 |
| 67 | Hocking County | 2371 |
| 68 | Meigs County | 2355 |
| 68 | Union County | 2355 |
| 69 | Ottawa County | 2329 |
| 70 | Logan County | 2294 |
| 71 | Williams County | 2147 |
| 72 | Defiance County | 2060 |
| 73 | Fulton County | 2015 |
| 74 | Carroll County | 1991 |
| 75 | Auglaize County | 1982 |
| 76 | Mercer County | 1969 |
| 77 | Hardin County | 1793 |
| 78 | Vinton County | 1790 |
| 79 | Noble County | 1614 |
| 80 | Morgan County | 1538 |
| 81 | Van Wert County | 1412 |
| 82 | Paulding County | 1335 |
| 83 | Putnam County | 1242 |
| 84 | Harrison County | 1228 |
| 84 | Henry County | 1228 |
| 85 | Monroe County | 998 |
| 86 | Wyandot County | 975 |