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The most populated counties in Ohio are Franklin County with 1,318,149, Cuyahoga County at 1,256,620, Hamilton County with 827,671, Summit County at 539,361, and Montgomery County with 536,121. You can get the most current Census population data for all 88 Ohio counties, sorted from the most populous counties in Ohio to the least, according to the 2022 American Community Survey.
Sure, you can copy this list right into your favorite spreadsheet tool. Or save yourself formatting headaches and grab the latest Ohio counties population data as a ready-to-use Excel™ file below. It's time to stop searching and start digging into data!
| Rank | County | Population |
|---|---|---|
| 1 | Franklin County | 1,318,149 |
| 2 | Cuyahoga County | 1,256,620 |
| 3 | Hamilton County | 827,671 |
| 4 | Summit County | 539,361 |
| 5 | Montgomery County | 536,121 |
| 6 | Lucas County | 430,014 |
| 7 | Butler County | 388,327 |
| 8 | Stark County | 374,199 |
| 9 | Lorain County | 313,101 |
| 10 | Warren County | 243,189 |
| 11 | Lake County | 232,236 |
| 12 | Mahoning County | 227,979 |
| 13 | Delaware County | 216,074 |
| 14 | Clermont County | 208,851 |
| 15 | Trumbull County | 201,749 |
| 16 | Medina County | 182,347 |
| 17 | Licking County | 178,844 |
| 18 | Greene County | 167,567 |
| 19 | Portage County | 161,217 |
| 20 | Fairfield County | 159,371 |
| 21 | Clark County | 135,877 |
| 22 | Wood County | 131,564 |
| 23 | Richland County | 125,008 |
| 24 | Wayne County | 116,680 |
| 25 | Miami County | 108,818 |
| 26 | Allen County | 102,087 |
| 27 | Columbiana County | 101,723 |
| 28 | Ashtabula County | 97,666 |
| 29 | Geauga County | 95,455 |
| 30 | Tuscarawas County | 92,840 |
| 31 | Muskingum County | 86,393 |
| 32 | Ross County | 76,957 |
| 33 | Erie County | 75,299 |
| 34 | Hancock County | 75,072 |
| 35 | Scioto County | 73,716 |
| 36 | Belmont County | 66,554 |
| 37 | Marion County | 65,366 |
| 38 | Jefferson County | 65,280 |
| 39 | Union County | 63,411 |
| 40 | Knox County | 62,657 |
| 41 | Athens County | 61,276 |
| 42 | Washington County | 59,639 |
| 43 | Sandusky County | 58,885 |
| 44 | Pickaway County | 58,809 |
| 45 | Huron County | 58,518 |
| 46 | Lawrence County | 57,994 |
| 47 | Seneca County | 55,062 |
| 48 | Ashland County | 52,522 |
| 49 | Darke County | 51,751 |
| 50 | Shelby County | 48,145 |
| 51 | Auglaize County | 46,263 |
| 52 | Logan County | 46,098 |
| 53 | Holmes County | 44,273 |
| 54 | Madison County | 43,961 |
| 55 | Brown County | 43,715 |
| 56 | Highland County | 43,285 |
| 57 | Fulton County | 42,602 |
| 58 | Mercer County | 42,321 |
| 59 | Clinton County | 42,077 |
| 60 | Crawford County | 41,861 |
| 61 | Preble County | 40,929 |
| 62 | Ottawa County | 40,367 |
| 63 | Champaign County | 38,715 |
| 64 | Guernsey County | 38,409 |
| 65 | Defiance County | 38,300 |
| 66 | Williams County | 36,973 |
| 67 | Coshocton County | 36,629 |
| 68 | Perry County | 35,451 |
| 69 | Morrow County | 35,049 |
| 70 | Putnam County | 34,400 |
| 71 | Jackson County | 32,563 |
| 72 | Hardin County | 30,622 |
| 73 | Gallia County | 29,276 |
| 74 | Fayette County | 28,901 |
| 75 | Van Wert County | 28,833 |
| 76 | Hocking County | 28,104 |
| 77 | Henry County | 27,601 |
| 78 | Adams County | 27,509 |
| 79 | Pike County | 27,151 |
| 80 | Carroll County | 26,761 |
| 81 | Meigs County | 22,242 |
| 82 | Wyandot County | 21,818 |
| 83 | Paulding County | 18,827 |
| 84 | Harrison County | 14,528 |
| 85 | Noble County | 14,216 |
| 86 | Morgan County | 13,851 |
| 87 | Monroe County | 13,401 |
| 88 | Vinton County | 12,790 |
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United States Census Bureau. B01001 SEX BY AGE, 2022 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 7 December 2023. http://www.census.gov/. |
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