Ohio Citizen Population By County in 2010 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2010, the citizen population for Ohio was 11,283,685 and represented 98.01% of the total Ohio population.

Among all Ohio counties, Cuyahoga had the highest citizen population (1.25M), followed by Franklin (1.08M), and Hamilton (781.00K).

In terms of percentages, Brown had the highest percentage of its population being citizens (99.98%), followed by Monroe (99.97%), and Vinton (99.96%).

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 2010

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

See this for other years:

Ohio Citizen Population By County in 2010

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County	Citizen Population	% of County Population
Cuyahoga	1254970	97.00
Franklin	1075825	94.28
Hamilton	781000	97.36
Summit	533130	98.16
Montgomery	529755	98.38
Lucas	436195	98.23
Stark	373015	99.12
Butler	352690	97.04
Lorain	296250	98.88
Mahoning	238870	98.75
Lake	224220	97.73
Trumbull	212070	99.67
Warren	202695	97.55
Clermont	192840	98.74
Medina	168030	98.76
Licking	162335	99.16
Delaware	161580	97.27
Portage	157765	98.64
Greene	156865	98.08
Fairfield	142300	98.85
Clark	137525	98.67
Richland	125415	99.55
Wood	123365	98.46
Wayne	113585	99.25
Columbiana	107970	99.41
Allen	105900	99.36
Miami	101500	99.20
Ashtabula	100930	99.08
Geauga	92910	99.26
Tuscarawas	91795	99.23
Muskingum	85470	99.44
Scioto	78485	99.36
Ross	77220	99.59
Erie	76655	98.97
Hancock	73170	97.99
Belmont	70145	99.63
Jefferson	69750	99.59
Marion	65970	99.16
Lawrence	62600	99.93
Athens	62230	96.55
Washington	61830	99.62
Sandusky	60690	99.03
Knox	59760	99.27
Huron	58580	97.75
Seneca	56670	99.26
Pickaway	54825	99.45
Ashland	52745	98.89
Darke	52665	99.47
Union	49975	98.55
Shelby	48780	98.85
Auglaize	45880	99.69
Logan	45675	99.28
Brown	44610	99.98
Crawford	44080	99.52
Highland	43535	99.74
Madison	42360	98.87
Fulton	42315	98.97
Preble	42225	99.35
Clinton	42070	99.19
Holmes	41940	99.69
Ottawa	41360	99.53
Mercer	40915	99.89
Guernsey	40210	99.65
Champaign	39835	99.24
Defiance	38845	99.30
Williams	37810	99.06
Coshocton	37015	99.92
Perry	35750	99.74
Morrow	34675	99.60
Putnam	34485	99.54
Jackson	33125	99.88
Hardin	32025	99.75
Gallia	30910	99.89
Hocking	29255	99.71
Carroll	28895	99.67
Van Wert	28880	99.48
Fayette	28640	99.05
Pike	28635	99.86
Adams	28510	99.76
Henry	28295	99.12
Meigs	23610	99.83
Wyandot	22480	99.18
Paulding	19545	99.31
Harrison	15845	99.87
Morgan	15090	99.84
Monroe	14745	99.97
Noble	14615	99.86
Vinton	13480	99.96