Ohio Citizen Population By County in 2019 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2019, the citizen population for Ohio was 11,397,175 and represented 97.79% of the total Ohio population.

Among all Ohio counties, Franklin had the highest citizen population (1.22M), followed by Cuyahoga (1.21M), and Hamilton (788.57K).

In terms of percentages, Carroll had the highest percentage of its population being citizens (99.93%), followed by Holmes (99.93%), and Monroe (99.93%).

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 2019

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

See this for other years:

Ohio Citizen Population By County in 2019

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County	Citizen Population	% of County Population
Franklin	1214620	94.13
Cuyahoga	1210035	97.00
Hamilton	788565	96.92
Summit	527340	97.42
Montgomery	518755	97.57
Lucas	423535	98.25
Stark	369235	99.15
Butler	367580	96.73
Lorain	304000	98.81
Mahoning	228175	99.22
Lake	224715	97.72
Warren	221900	96.85
Clermont	202000	98.89
Trumbull	199625	99.63
Delaware	194020	96.46
Medina	176560	99.20
Licking	172170	99.09
Greene	162675	97.70
Portage	158395	97.47
Fairfield	152110	98.48
Clark	133325	98.96
Wood	127820	98.21
Richland	120265	99.31
Wayne	114870	98.94
Miami	104450	99.13
Columbiana	102710	99.54
Allen	102320	99.17
Ashtabula	97300	99.46
Geauga	93150	99.26
Tuscarawas	91310	98.89
Muskingum	85680	99.48
Ross	76600	99.55
Scioto	75770	99.65
Erie	74235	99.27
Hancock	74210	97.86
Belmont	67785	99.65
Jefferson	66020	99.47
Marion	64690	99.07
Athens	63775	96.75
Knox	61045	99.29
Lawrence	59965	99.63
Washington	59950	99.21
Sandusky	58640	99.34
Huron	57830	99.13
Pickaway	57510	99.57
Union	55460	97.80
Seneca	54740	98.90
Ashland	53170	99.32
Darke	51340	99.66
Shelby	48335	99.15
Auglaize	45540	99.59
Logan	44995	99.29
Holmes	43870	99.93
Madison	43615	98.82
Brown	43440	99.70
Highland	42870	99.66
Fulton	41870	99.09
Clinton	41615	99.19
Crawford	41530	99.31
Preble	40895	99.51
Ottawa	40500	99.68
Mercer	40480	99.01
Guernsey	39010	99.74
Champaign	38705	99.64
Defiance	37725	98.86
Williams	36605	99.43
Coshocton	36525	99.84
Perry	35960	99.83
Morrow	34990	99.84
Putnam	33645	99.22
Jackson	32315	99.58
Hardin	30950	98.49
Gallia	29900	99.37
Hocking	28315	99.74
Fayette	28285	98.83
Van Wert	28170	99.68
Pike	27935	99.77
Adams	27725	99.82
Carroll	27310	99.93
Henry	27030	99.34
Meigs	23030	99.78
Wyandot	21805	99.11
Paulding	18655	99.18
Harrison	15145	99.57
Morgan	14605	99.76
Noble	14350	99.55
Monroe	13930	99.93
Vinton	13060	99.81