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Demographic Data Report for Illinois by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2014-2018 American Community Survey 5-Year Data
Sorted by Value
County
 sort alphabetically by name ascending
Value (Percent)
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People (Age Under 18)
 sort by sample size ascending
Rank within US
(of 3141 counties)
 sort by rank ascending
United States 22.8 73,553,240 N/A
Illinois 22.8 2,926,561 22 of 52
Pope County 14.3 608 3,110
Brown County 15.7 1,046 3,065
McDonough County 16.7 5,141 3,000
Hardin County 17.6 707 2,912
Coles County 18.1 9,357 2,860
Jackson County 18.2 10,650 2,842
Henderson County 18.4 1,270 2,808
Johnson County 18.5 2,329 2,798
Champaign County 18.9 39,556 2,727
Schuyler County 19.0 1,345 2,694
Perry County 19.1 4,078 2,685
Morgan County 19.1 6,570 2,683
Bond County 19.2 3,205 2,661
Jo Daviess County 19.2 4,202 2,643
Logan County 19.3 5,640 2,624
Lawrence County 19.4 3,143 2,594
Randolph County 19.4 6,322 2,592
Carroll County 19.5 2,841 2,572
Knox County 19.7 10,058 2,522
Putnam County 19.8 1,139 2,500
Montgomery County 19.8 5,757 2,489
Lee County 19.9 6,867 2,476
Crawford County 19.9 3,798 2,472
Fulton County 20.0 7,084 2,451
Marshall County 20.1 2,374 2,410
Christian County 20.6 6,843 2,266
Mason County 20.7 2,855 2,221
Gallatin County 20.7 1,069 2,219
Edgar County 20.8 3,644 2,197
Fayette County 20.8 4,522 2,184
Union County 20.9 3,572 2,170
Hancock County 20.9 3,785 2,154
Calhoun County 21.0 1,019 2,121
Jersey County 21.0 4,631 2,118
Greene County 21.0 2,781 2,101
Clinton County 21.2 7,992 2,043
Shelby County 21.4 4,669 1,988
Macoupin County 21.4 9,793 1,974
Pulaski County 21.5 1,207 1,939
Livingston County 21.6 7,841 1,920
Washington County 21.6 3,059 1,903
Stephenson County 21.6 9,824 1,898
Mercer County 21.6 3,397 1,887
DeKalb County 21.7 22,593 1,870
Bureau County 21.7 7,258 1,833
Saline County 21.7 5,269 1,829
La Salle County 21.8 24,035 1,820
McLean County 21.8 37,736 1,813
Stark County 21.8 1,199 1,803
De Witt County 21.8 3,498 1,800
Iroquois County 21.9 6,167 1,756
Williamson County 21.9 14,744 1,750
Madison County 22.0 58,568 1,688
White County 22.0 3,092 1,686
Menard County 22.1 2,734 1,671
Jefferson County 22.1 8,446 1,657
Wabash County 22.2 2,564 1,646
Massac County 22.2 3,200 1,636
Hamilton County 22.2 1,824 1,632
Franklin County 22.2 8,691 1,615
Cook County 22.2 1,160,425 1,613
Clay County 22.3 2,973 1,584
Macon County 22.3 23,754 1,577
Warren County 22.4 3,876 1,557
Whiteside County 22.4 12,610 1,555
Rock Island County 22.4 32,525 1,543
Scott County 22.4 1,130 1,541
Henry County 22.5 11,114 1,518
Pike County 22.5 3,544 1,503
Piatt County 22.5 3,702 1,484
Monroe County 22.6 7,657 1,466
Sangamon County 22.6 44,614 1,462
Adams County 22.6 15,033 1,440
Richland County 22.7 3,612 1,394
Wayne County 22.7 3,750 1,393
Ogle County 22.8 11,712 1,366
Cumberland County 22.8 2,481 1,357
Ford County 22.9 3,062 1,347
Tazewell County 22.9 30,683 1,301
Marion County 22.9 8,736 1,291
Clark County 23.0 3,641 1,268
Jasper County 23.0 2,207 1,267
DuPage County 23.1 214,874 1,238
Edwards County 23.3 1,515 1,148
Kankakee County 23.4 25,959 1,112
Effingham County 23.6 8,076 1,007
Winnebago County 23.6 67,673 1,000
St. Clair County 23.7 62,455 983
Peoria County 23.8 43,887 937
Vermilion County 23.8 18,682 919
Cass County 24.1 3,054 787
McHenry County 24.2 74,431 765
Alexander County 24.2 1,581 755
Woodford County 24.7 9,569 624
Lake County 24.8 174,179 596
Douglas County 25.2 4,959 500
Moultrie County 25.3 3,727 464
Boone County 25.6 13,707 420
Grundy County 25.6 12,936 414
Will County 25.7 177,161 385
Kane County 26.3 139,745 317
Kendall County 29.2 36,342 117
Notes:
Created by statecancerprofiles.cancer.gov on 04/20/2021 9:40 pm.
Source: Demographic data provided by the Census Bureau and the American Community Survey.
For more information about Population: Age under 18, see the dictionary.
Health Service Areas are a single county or cluster of contiguous counties which are relatively self-contained with respect to hospital care. For more detailed information, please see Health Service Area information page. Puerto Rico is being treated as a Health Service Area for this data presentation.
Data for United States does not include Puerto Rico.

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