Illinois Citizen Population By County in 2014 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2014, the citizen population for Illinois was 11,920,505 and represented 92.63% of the total Illinois population.

Among all Illinois counties, Cook had the highest citizen population (4.64M), followed by DuPage (847.17K), and Will (643.03K).

In terms of percentages, Gallatin had the highest percentage of its population being citizens (100.00%), followed by Hardin (100.00%), and Edwards (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:
Illinois Citizen Voting-age Population By County in 2014

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

See this for other years:

Illinois Citizen Population By County in 2014

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County	Citizen Population	% of County Population
Cook	4644255	88.84
DuPage	847170	91.44
Will	643030	94.27
Lake	635825	90.42
Kane	460155	88.17
McHenry	292795	95.10
Winnebago	279255	95.63
St. Clair	265115	98.77
Madison	264915	98.87
Sangamon	195320	98.25
Champaign	187820	91.97
Peoria	181345	96.88
McLean	165115	95.78
Rock Island	140170	95.38
Tazewell	134945	99.32
Kendall	114035	96.48
LaSalle	110720	98.24
Kankakee	109230	96.94
Macon	108225	98.53
DeKalb	100165	95.47
Vermilion	79850	98.86
Adams	66590	99.22
Williamson	66010	98.80
Jackson	57725	96.01
Whiteside	56910	98.67
Coles	53100	98.97
Knox	51735	98.65
Ogle	51300	97.20
Boone	50680	93.84
Henry	49410	98.76
Grundy	49380	98.42
Macoupin	47060	99.64
Stephenson	46690	99.22
Franklin	39570	99.49
Woodford	38770	99.50
Marion	38735	99.53
Jefferson	38420	99.24
Livingston	38135	99.12
Clinton	37710	99.37
Fulton	36190	98.84
Morgan	34950	99.09
Lee	34730	98.53
Christian	34290	99.64
Effingham	34125	99.55
Bureau	33475	97.42
Monroe	33340	99.90
Randolph	32865	99.32
McDonough	31710	97.90
Logan	29695	98.84
Montgomery	29545	99.34
Iroquois	28660	97.92
Saline	24760	99.54
Jersey	22635	99.50
Shelby	22160	99.75
Jo Daviess	22100	98.55
Fayette	21905	99.39
Perry	21835	99.09
Crawford	19475	99.24
Douglas	19325	97.28
Hancock	18725	99.55
Edgar	18090	99.56
Bond	17370	98.86
Union	17355	98.50
Warren	16960	95.36
Wayne	16565	99.64
Piatt	16450	99.40
De Witt	16410	99.70
Lawrence	16370	97.88
Pike	16185	99.63
Clark	16165	99.54
Mercer	16130	99.54
Richland	16075	99.57
Massac	15110	99.74
Moultrie	14820	99.50
Carroll	14770	98.30
White	14515	99.76
Washington	14465	99.59
Mason	14185	99.13
Ford	13825	99.43
Greene	13655	99.85
Clay	13585	99.34
Menard	12640	99.84
Johnson	12565	99.33
Cass	12375	92.08
Marshall	12180	98.86
Wabash	11560	98.55
Cumberland	10845	99.04
Jasper	9550	98.86
Hamilton	8340	99.64
Alexander	7765	99.30
Schuyler	7415	99.46
Henderson	7045	99.58
Brown	6735	97.89
Edwards	6680	99.93
Pulaski	5895	98.83
Stark	5875	99.75
Putnam	5845	99.15
Gallatin	5440	100.00
Scott	5250	99.81
Calhoun	5010	99.50
Pope	4345	99.66
Hardin	4225	100.00