# Counties in Ohio by median age on 1 July (US county estimates), 2025

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

- Indicator id: `median_age_pep`
- Unit: years
- Definition: Age that divides the resident population of a US county into two halves of equal size on 1 July, from Census Bureau population estimates calculated by single year of age.
- Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage (https://www.census.gov/programs-surveys/popest/data/data-sets.html)
- Publisher page: https://invokely.ai/en/publishers/us-census-bureau
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/median-age-july-1-us-counties/ohio-counties

| Rank | Place | years |
|---:|---|---:|
| 1 | Ottawa County | 51.5 |
| 2 | Monroe County | 46.9 |
| 3 | Carroll County | 46.4 |
| 4 | Erie County | 46.2 |
| 5 | Geauga County | 45.8 |
| 6 | Harrison County | 45.7 |
| 7 | Columbiana County | 45.4 |
| 8 | Belmont County | 45.3 |
| 9 | Meigs County | 45.2 |
| 10 | Lake County | 45 |
| 10 | Morgan County | 45 |
| 12 | Washington County | 44.6 |
| 13 | Hocking County | 44.5 |
| 14 | Medina County | 44.3 |
| 15 | Trumbull County | 44.1 |
| 16 | Wyandot County | 44 |
| 17 | Preble County | 43.7 |
| 18 | Crawford County | 43.6 |
| 19 | Ashtabula County | 43.5 |
| 19 | Jefferson County | 43.5 |
| 19 | Mahoning County | 43.5 |
| 22 | Logan County | 43.4 |
| 22 | Sandusky County | 43.4 |
| 24 | Vinton County | 43.3 |
| 25 | Lawrence County | 43.2 |
| 25 | Morrow County | 43.2 |
| 27 | Lorain County | 43 |
| 28 | Fulton County | 42.8 |
| 29 | Brown County | 42.7 |
| 30 | Darke County | 42.6 |
| 31 | Williams County | 42.5 |
| 32 | Champaign County | 42.4 |
| 33 | Guernsey County | 42.3 |
| 34 | Henry County | 42.2 |
| 34 | Stark County | 42.2 |
| 36 | Auglaize County | 42 |
| 37 | Ashland County | 41.9 |
| 38 | Miami County | 41.8 |
| 38 | Summit County | 41.8 |
| 40 | Fayette County | 41.7 |
| 40 | Ross County | 41.7 |
| 42 | Paulding County | 41.6 |
| 42 | Perry County | 41.6 |
| 44 | Adams County | 41.5 |
| 44 | Clark County | 41.5 |
| 44 | Defiance County | 41.5 |
| 44 | Huron County | 41.5 |
| 48 | Coshocton County | 41.4 |
| 48 | Gallia County | 41.4 |
| 48 | Richland County | 41.4 |
| 48 | Tuscarawas County | 41.4 |
| 52 | Clinton County | 41.3 |
| 53 | Clermont County | 41.2 |
| 53 | Highland County | 41.2 |
| 53 | Van Wert County | 41.2 |
| 56 | Pike County | 41.1 |
| 57 | Scioto County | 41 |
| 58 | Cuyahoga County | 40.9 |
| 58 | Marion County | 40.9 |
| 60 | Madison County | 40.8 |
| 60 | Muskingum County | 40.8 |
| 60 | Warren County | 40.8 |
| 63 | Jackson County | 40.7 |
| 63 | Licking County | 40.7 |
| 63 | Putnam County | 40.7 |
| 66 | Hancock County | 40.6 |
| 66 | Seneca County | 40.6 |
| 68 | Delaware County | 40.5 |
| 68 | Noble County | 40.5 |
| 70 | Portage County | 40.4 |
| 71 | Knox County | 40.3 |
| 72 | Allen County | 40.1 |
| 73 | Shelby County | 40 |
| 74 | Fairfield County | 39.8 |
| 75 | Pickaway County | 39.7 |
| 76 | Lucas County | 39.6 |
| 77 | Wayne County | 39.4 |
| 78 | Mercer County | 39.3 |
| 78 | Montgomery County | 39.3 |
| 80 | Union County | 38.7 |
| 81 | Greene County | 38.6 |
| 82 | Butler County | 38 |
| 83 | Hamilton County | 37.2 |
| 84 | Wood County | 36.9 |
| 85 | Hardin County | 36.5 |
| 86 | Franklin County | 35.1 |
| 87 | Holmes County | 31.9 |
| 88 | Athens County | 30.5 |