Ohio Counties by Population

Below are the 88 Ohio counties sorted by population from largest to smallest. The population data are from the 2022 Population Estimates Program and 2021 American Community Survey.

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Rank County Population
1 Franklin County 1,321,820
2 Cuyahoga County 1,236,041
3 Hamilton County 825,037
4 Summit County 535,882
5 Montgomery County 533,892
6 Lucas County 426,643
7 Butler County 388,420
8 Stark County 372,657
9 Lorain County 316,268
10 Warren County 249,778
11 Lake County 231,842
12 Delaware County 226,296
13 Mahoning County 225,636
14 Clermont County 210,805
15 Trumbull County 200,643
16 Medina County 183,512
17 Licking County 181,359
18 Greene County 168,456
19 Fairfield County 162,898
20 Portage County 161,745
21 Clark County 134,831
22 Wood County 131,592
23 Richland County 125,319
24 Wayne County 116,559
25 Miami County 110,247
26 Allen County 101,115
27 Columbiana County 100,511
28 Ashtabula County 97,014
29 Geauga County 95,469
30 Tuscarawas County 91,937
31 Muskingum County 86,113
32 Ross County 76,606
33 Hancock County 74,861
34 Erie County 74,501
35 Scioto County 72,194
36 Union County 66,898
37 Belmont County 65,509
38 Marion County 64,642
39 Jefferson County 64,330
40 Knox County 63,183
41 Pickaway County 60,023
42 Athens County 58,979
43 Washington County 58,901
44 Sandusky County 58,667
45 Huron County 58,218
46 Lawrence County 56,653
47 Seneca County 54,632
48 Ashland County 52,181
49 Darke County 51,529
50 Shelby County 47,671
51 Logan County 46,040
52 Auglaize County 45,948
53 Holmes County 44,390
54 Brown County 43,680
55 Madison County 43,540
56 Highland County 43,391
57 Mercer County 42,348
58 Fulton County 42,171
59 Clinton County 41,964
60 Crawford County 41,522
61 Preble County 40,596
62 Ottawa County 39,978
63 Champaign County 38,709
64 Defiance County 38,187
65 Guernsey County 38,098
66 Williams County 36,652
67 Coshocton County 36,571
68 Perry County 35,480
69 Morrow County 35,339
70 Putnam County 34,334
71 Jackson County 32,586
72 Hardin County 30,416
73 Gallia County 29,068
74 Fayette County 28,839
75 Van Wert County 28,769
76 Hocking County 27,858
77 Henry County 27,512
78 Adams County 27,420
79 Pike County 27,005
80 Carroll County 26,659
81 Meigs County 21,969
82 Wyandot County 21,567
83 Paulding County 18,757
84 Harrison County 14,378
85 Noble County 14,335
86 Morgan County 13,668
87 Monroe County 13,234
88 Vinton County 12,565

United States Census Bureau. B01001 SEX BY AGE, 2021 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 8 December 2022. http://www.census.gov/.

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2022. U.S. Census Bureau, Population Division. Web. May 2023. http://www.census.gov/.

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