County Census Records
Ohio Counties
88 counties with population data from the decennial US Census, 1790 to 2020.
88 counties
Population as of 2020 census
Adams
27,477
Allen
102,206
Ashland
52,447
Ashtabula
97,574
Athens
62,431
Auglaize
46,422
Belmont
66,497
Brown
43,676
Butler
390,357
Carroll
26,721
Champaign
38,714
Clark
136,001
Clermont
208,601
Clinton
42,018
Columbiana
101,877
Coshocton
36,612
Crawford
42,025
Cuyahoga
1,264,817
Darke
51,881
Defiance
38,286
Delaware
214,124
Erie
75,622
Fairfield
158,921
Fayette
28,951
Franklin
1,323,807
Fulton
42,713
Gallia
29,220
Geauga
95,397
Greene
167,966
Guernsey
38,438
Hamilton
830,639
Hancock
74,920
Hardin
30,696
Harrison
14,483
Henry
27,662
Highland
43,317
Hocking
28,050
Holmes
44,223
Huron
58,565
Jackson
32,653
Jefferson
65,249
Knox
62,721
Lake
232,603
Lawrence
58,240
Licking
178,519
Logan
46,150
Lorain
312,964
Lucas
431,279
Madison
43,824
Mahoning
228,614
Marion
65,359
Medina
182,470
Meigs
22,210
Mercer
42,528
Miami
108,774
Monroe
13,385
Montgomery
537,309
Morgan
13,802
Morrow
34,950
Muskingum
86,410
Noble
14,115
Ottawa
40,364
Paulding
18,806
Perry
35,408
Pickaway
58,539
Pike
27,088
Portage
161,791
Preble
40,999
Putnam
34,451
Richland
124,936
Ross
77,093
Sandusky
58,896
Scioto
74,008
Seneca
55,069
Shelby
48,230
Stark
374,853
Summit
540,428
Trumbull
201,977
Tuscarawas
93,263
Union
62,784
Van Wert
28,931
Vinton
12,800
Warren
242,337
Washington
59,771
Wayne
116,894
Williams
37,102
Wood
132,248
Wyandot
21,900
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Native Heritage
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Settlement
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Notable People
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