Census ACS 2023 · 88 counties
Largest Counties in Ohio
Ohio has 88 counties with Census data available. The largest is Franklin County with a population of 1,321,635. County-level data is important because counties are the primary unit of local government in most states, responsible for courts, elections, public health, and infrastructure. Population distribution across counties reveals where growth is concentrated and where rural decline may be occurring.
Source: Census ACS 2023 5-Year Estimates
| # | County | Population | Median Income |
|---|---|---|---|
| 1 | Wyandot County | 21,699 | $71,878 |
| 2 | Wood County | 131,795 | $73,124 |
| 3 | Williams County | 36,862 | $61,834 |
| 4 | Wayne County | 116,618 | $71,769 |
| 5 | Washington County | 59,318 | $61,355 |
| 6 | Warren County | 246,364 | $107,843 |
| 7 | Vinton County | 12,686 | $53,813 |
| 8 | Van Wert County | 28,824 | $65,344 |
| 9 | Union County | 65,293 | $109,506 |
| 10 | Tuscarawas County | 92,585 | $64,494 |
| 11 | Trumbull County | 201,367 | $55,088 |
| 12 | Summit County | 538,087 | $71,016 |
| 13 | Stark County | 373,764 | $65,740 |
| 14 | Shelby County | 48,007 | $72,822 |
| 15 | Seneca County | 54,861 | $65,020 |
| 16 | Scioto County | 73,118 | $49,571 |
| 17 | Sandusky County | 58,770 | $62,500 |
| 18 | Ross County | 76,748 | $59,819 |
| 19 | Richland County | 125,138 | $57,649 |
| 20 | Putnam County | 34,352 | $82,785 |
| 21 | Preble County | 40,802 | $71,237 |
| 22 | Portage County | 161,421 | $72,822 |
| 23 | Pike County | 27,080 | $49,552 |
| 24 | Pickaway County | 59,407 | $72,927 |
| 25 | Perry County | 35,474 | $64,737 |
| 26 | Paulding County | 18,800 | $68,167 |
| 27 | Ottawa County | 40,161 | $75,728 |
| 28 | Noble County | 14,252 | $55,360 |
| 29 | Muskingum County | 86,382 | $59,203 |
| 30 | Morrow County | 35,214 | $71,047 |
| 31 | Morgan County | 13,758 | $55,971 |
| 32 | Montgomery County | 535,528 | $64,403 |
| 33 | Monroe County | 13,308 | $58,962 |
| 34 | Miami County | 109,549 | $74,175 |
| 35 | Mercer County | 42,438 | $78,036 |
| 36 | Meigs County | 22,072 | $46,701 |
| 37 | Medina County | 183,049 | $92,660 |
| 38 | Marion County | 65,145 | $57,306 |
| 39 | Mahoning County | 227,063 | $55,576 |
| 40 | Madison County | 44,126 | $83,229 |
| 41 | Lucas County | 428,748 | $60,095 |
| 42 | Lorain County | 314,588 | $70,693 |
| 43 | Logan County | 46,140 | $69,183 |
| 44 | Licking County | 180,311 | $81,033 |
| 45 | Lawrence County | 57,385 | $54,842 |
| 46 | Lake County | 232,101 | $77,952 |
| 47 | Knox County | 62,888 | $73,988 |
| 48 | Jefferson County | 64,855 | $56,983 |
| 49 | Jackson County | 32,588 | $58,409 |
| 50 | Huron County | 58,412 | $65,972 |
| 51 | Holmes County | 44,312 | $74,774 |
| 52 | Hocking County | 27,938 | $61,366 |
| 53 | Highland County | 43,403 | $62,008 |
| 54 | Henry County | 27,581 | $79,267 |
| 55 | Harrison County | 14,408 | $53,851 |
| 56 | Hardin County | 30,527 | $58,001 |
| 57 | Hancock County | 74,885 | $69,699 |
| 58 | Hamilton County | 827,878 | $70,816 |
| 59 | Guernsey County | 38,283 | $55,756 |
| 60 | Greene County | 168,531 | $85,218 |
| 61 | Geauga County | 95,479 | $100,783 |
| 62 | Gallia County | 29,162 | $56,455 |
| 63 | Fulton County | 42,434 | $72,866 |
| 64 | Franklin County | 1,321,635 | $73,795 |
| 65 | Fayette County | 28,880 | $60,047 |
| 66 | Fairfield County | 161,289 | $87,069 |
| 67 | Erie County | 74,938 | $68,431 |
| 68 | Delaware County | 221,160 | $130,088 |
| 69 | Defiance County | 38,258 | $73,615 |
| 70 | Darke County | 51,655 | $64,654 |
| 71 | Cuyahoga County | 1,249,418 | $62,823 |
| 72 | Crawford County | 41,767 | $55,477 |
| 73 | Coshocton County | 36,679 | $54,687 |
| 74 | Columbiana County | 101,203 | $58,474 |
| 75 | Clinton County | 42,014 | $68,125 |
| 76 | Clermont County | 209,862 | $83,178 |
| 77 | Clark County | 135,445 | $60,846 |
| 78 | Champaign County | 38,772 | $74,239 |
| 79 | Carroll County | 26,731 | $64,675 |
| 80 | Butler County | 389,910 | $81,194 |
| 81 | Brown County | 43,710 | $69,990 |
| 82 | Belmont County | 65,982 | $58,411 |
| 83 | Auglaize County | 46,209 | $76,454 |
| 84 | Athens County | 61,573 | $53,837 |
| 85 | Ashtabula County | 97,343 | $55,507 |
| 86 | Ashland County | 52,296 | $64,991 |
| 87 | Allen County | 101,685 | $62,001 |
| 88 | Adams County | 27,510 | $49,521 |
More Rankings for Ohio
Frequently Asked Questions
Franklin County is the #1 ranked county in Ohio by population, with a value of 1,321,635 according to Census ACS 2023 data.
Ohio has 88 counties tracked in Census ACS 2023 data.
All data comes from the American Community Survey (ACS) 2023 5-Year estimates by the US Census Bureau.
Data from the American Community Survey 2023 5-Year estimates. Covers all counties in Ohio.