Ohio 2020 Census Total Voting-age Population (18yrs and over) By County

Updated on August 21, 2023.

According to the data from the US 2020 decennial Census, as at April 2020, the total Voting-age population (18 years and over) of Ohio was 9,207,562, which was 78.03% of the total Ohio population.

Franklin County had the highest voting-age population (1,022,233), followed by Cuyahoga County (1,008,892), and then Hamilton County (645,526). On the other hand, the 3 counties with low voting-age population were: Vinton County (9,981), Monroe County (10,698), and Morgan County (10,947).

You can also see this information for other states and also for the US by state.

Hover over or click on the counties to see the number and percentage of Ohio population that lives in each county. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can also see the voting-age population by county for the different racial groups as well as the different ethnicities in Ohio.

Ohio 2020 Census Total Voting-age Population By County
Ohio 2020 Census Total Voting-age Population By County
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County Voting-age Population % of Ohio Pop.
Adams 20896 0.23
Allen 78419 0.85
Ashland 40638 0.44
Ashtabula 76412 0.83
Athens 52633 0.57
Auglaize 35366 0.38
Belmont 53782 0.58
Brown 33734 0.37
Butler 299082 3.25
Carroll 21151 0.23
Champaign 29878 0.32
Clark 105692 1.15
Clermont 160815 1.75
Clinton 32671 0.36
Columbiana 81318 0.88
Coshocton 27671 0.30
Crawford 33149 0.36
Cuyahoga 1008892 10.96
Darke 39608 0.43
Defiance 29420 0.32
Delaware 157099 1.71
Erie 60530 0.66
Fairfield 120333 1.31
Fayette 22198 0.24
Franklin 1022233 11.10
Fulton 32659 0.36
Gallia 22432 0.24
Geauga 73972 0.80
Greene 132605 1.44
Guernsey 30106 0.33
Hamilton 645526 7.01
Hancock 58460 0.64
Hardin 23628 0.26
Harrison 11427 0.12
Henry 21212 0.23
Highland 32967 0.36
Hocking 21922 0.24
Holmes 30519 0.33
Huron 44780 0.49
Jackson 24906 0.27
Jefferson 52568 0.57
Knox 48296 0.53
Lake 187311 2.03
Lawrence 45579 0.50
Licking 137465 1.49
Logan 35835 0.39
Lorain 245242 2.66
Lucas 334866 3.64
Madison 34632 0.38
Mahoning 183667 2.00
Marion 51628 0.56
Medina 142218 1.55
Meigs 17507 0.19
Mercer 31679 0.34
Miami 83447 0.91
Monroe 10698 0.12
Montgomery 420586 4.57
Morgan 10947 0.12
Morrow 26895 0.29
Muskingum 66950 0.73
Noble 11433 0.12
Ottawa 32939 0.36
Paulding 14273 0.16
Perry 26960 0.29
Pickaway 45401 0.49
Pike 20627 0.22
Portage 132034 1.43
Preble 31745 0.35
Putnam 25676 0.28
Richland 97883 1.06
Ross 60804 0.66
Sandusky 45950 0.50
Scioto 58128 0.63
Seneca 43031 0.47
Shelby 36270 0.39
Stark 294899 3.20
Summit 428512 4.65
Trumbull 161789 1.76
Tuscarawas 72057 0.78
Union 46614 0.51
Van Wert 22063 0.24
Vinton 9981 0.11
Warren 182253 1.98
Washington 47860 0.52
Wayne 88837 0.97
Williams 28880 0.31
Wood 104955 1.14
Wyandot 16951 0.18