# Counties in Ohio by population aged 18 to 64, 2025

All 88 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_18_64_share`
- Unit: %
- Definition: Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.
- Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (https://www.census.gov/programs-surveys/popest/data/data-sets.html)
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/population-18-64/ohio-counties

| Rank | Place | % |
|---:|---|---:|
| 1 | Athens County | 69.6 |
| 2 | Franklin County | 63 |
| 3 | Noble County | 62.3 |
| 4 | Portage County | 61.7 |
| 5 | Madison County | 61.6 |
| 6 | Wood County | 61.4 |
| 7 | Union County | 61.3 |
| 8 | Pickaway County | 60.4 |
| 9 | Butler County | 60.3 |
| 10 | Hamilton County | 60 |
| 11 | Ross County | 59.9 |
| 12 | Greene County | 59.8 |
| 13 | Delaware County | 59.5 |
| 14 | Warren County | 59.1 |
| 15 | Cuyahoga County | 58.8 |
| 16 | Hardin County | 58.5 |
| 17 | Fairfield County | 58.5 |
| 18 | Clermont County | 58.5 |
| 19 | Summit County | 58.4 |
| 20 | Lucas County | 58.4 |
| 21 | Montgomery County | 58.4 |
| 22 | Marion County | 58.3 |
| 23 | Licking County | 58.2 |
| 24 | Scioto County | 58.1 |
| 25 | Hancock County | 58 |
| 26 | Seneca County | 57.7 |
| 27 | Lawrence County | 57.5 |
| 28 | Clinton County | 57.5 |
| 29 | Lake County | 57.3 |
| 30 | Medina County | 57.3 |
| 31 | Lorain County | 57.1 |
| 32 | Morrow County | 57 |
| 33 | Muskingum County | 57 |
| 34 | Vinton County | 57 |
| 35 | Hocking County | 56.9 |
| 36 | Champaign County | 56.9 |
| 37 | Richland County | 56.9 |
| 38 | Jackson County | 56.9 |
| 39 | Belmont County | 56.8 |
| 40 | Jefferson County | 56.7 |
| 41 | Perry County | 56.7 |
| 42 | Huron County | 56.7 |
| 43 | Stark County | 56.7 |
| 44 | Fayette County | 56.6 |
| 45 | Meigs County | 56.4 |
| 46 | Washington County | 56.4 |
| 47 | Allen County | 56.4 |
| 48 | Brown County | 56.4 |
| 49 | Shelby County | 56.4 |
| 50 | Miami County | 56.4 |
| 51 | Clark County | 56.3 |
| 52 | Pike County | 56.2 |
| 53 | Ashtabula County | 56.2 |
| 54 | Knox County | 56.2 |
| 55 | Logan County | 56.2 |
| 56 | Wayne County | 56 |
| 57 | Trumbull County | 56 |
| 58 | Columbiana County | 56 |
| 59 | Mahoning County | 56 |
| 60 | Guernsey County | 55.9 |
| 61 | Sandusky County | 55.9 |
| 62 | Highland County | 55.9 |
| 63 | Williams County | 55.9 |
| 64 | Fulton County | 55.8 |
| 65 | Adams County | 55.7 |
| 66 | Defiance County | 55.5 |
| 67 | Henry County | 55.5 |
| 68 | Crawford County | 55.5 |
| 69 | Paulding County | 55.4 |
| 70 | Ashland County | 55.4 |
| 70 | Preble County | 55.4 |
| 72 | Wyandot County | 55.3 |
| 73 | Van Wert County | 55.3 |
| 74 | Gallia County | 55.2 |
| 75 | Tuscarawas County | 55.2 |
| 76 | Auglaize County | 55.1 |
| 77 | Morgan County | 54.9 |
| 78 | Carroll County | 54.8 |
| 79 | Erie County | 54.6 |
| 80 | Coshocton County | 54.5 |
| 81 | Holmes County | 54.2 |
| 82 | Putnam County | 53.9 |
| 83 | Darke County | 53.9 |
| 84 | Harrison County | 53.6 |
| 85 | Monroe County | 53.6 |
| 86 | Ottawa County | 53.4 |
| 87 | Mercer County | 53.2 |
| 88 | Geauga County | 53.1 |