Ohio Citizen Population By County in 2024 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2024, the citizen population for Ohio was 11,520,625 and represented 97.55% of the total Ohio population.

Among all Ohio counties, Franklin had the highest citizen population (1.25M), followed by Cuyahoga (1.21M), and Hamilton (801.70K).

In terms of percentages, Vinton had the highest percentage of its population being citizens (99.99%), followed by Harrison (99.89%), and Carroll (99.86%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

You can see similar information for other states and by state for the United States.

You may also be interested in:
Ohio Citizen Voting-age Population By County in 2024

Data Source: US Census - ACS 5-Year (CVAP).

See this for other years:

Ohio Citizen Population By County in 2024

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County	Citizen Population	% of County Population
Franklin	1244589	93.36
Cuyahoga	1208971	97.04
Hamilton	801704	96.50
Summit	523774	97.38
Montgomery	522085	97.39
Lucas	421388	98.45
Butler	376130	95.74
Stark	370183	99.05
Lorain	313388	98.82
Warren	238928	95.57
Lake	228098	98.23
Mahoning	224250	99.01
Delaware	215783	95.13
Clermont	208837	98.89
Trumbull	200272	99.67
Medina	181672	98.92
Licking	179541	98.74
Greene	166619	98.19
Fairfield	161068	98.54
Portage	158756	98.02
Clark	132842	98.29
Wood	129649	98.17
Richland	124363	99.41
Wayne	114816	98.48
Miami	108982	98.81
Allen	100281	98.95
Columbiana	100168	99.47
Ashtabula	96244	99.05
Geauga	95103	99.60
Tuscarawas	90985	98.48
Muskingum	86067	99.60
Ross	76189	99.61
Erie	73494	98.54
Hancock	73315	97.93
Scioto	72262	99.50
Union	65171	96.80
Belmont	65163	99.53
Marion	64681	99.48
Jefferson	64240	99.57
Knox	62528	99.03
Athens	60226	97.55
Pickaway	59978	99.74
Washington	58683	99.50
Sandusky	58246	99.10
Huron	57623	98.81
Lawrence	56614	99.63
Seneca	54368	99.27
Ashland	51944	99.40
Darke	51267	99.37
Shelby	47664	99.44
Auglaize	46025	99.79
Logan	45709	99.18
Holmes	44302	99.74
Madison	44003	99.06
Brown	43710	99.70
Highland	43351	99.61
Mercer	41909	98.65
Fulton	41841	99.06
Crawford	41358	99.16
Clinton	41294	98.29
Preble	40653	99.72
Ottawa	39813	99.55
Champaign	38652	99.60
Defiance	38151	99.50
Guernsey	38050	99.55
Coshocton	36666	99.80
Williams	36447	99.27
Perry	35402	99.62
Morrow	35314	99.75
Putnam	33988	99.05
Jackson	32503	99.55
Hardin	30331	99.52
Gallia	28990	99.73
Van Wert	28604	99.22
Fayette	28575	98.95
Hocking	27759	99.86
Henry	27448	99.56
Adams	27329	99.23
Pike	26972	99.73
Carroll	26619	99.86
Meigs	21819	99.66
Wyandot	21336	98.79
Paulding	18516	98.52
Harrison	14289	99.89
Noble	14241	99.68
Morgan	13620	99.78
Monroe	13196	99.77
Vinton	12631	99.99