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Demographic Data Report for Illinois by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2017-2021 American Community Survey 5-Year Data
Sorted by Count
County
 sort alphabetically by name ascending
Value (Percent)
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People (Age Under 18)
 sort by sample size descending
Rank within US
(of 3143 counties)
 sort by rank ascending
Illinois 22.5 2,887,351 24 of 52
United States 22.5 74,234,075 N/A
Hardin County 13.8 511 3,109
Pope County 18.1 693 2,813
Calhoun County 20.2 917 2,337
Gallatin County 19.9 1,005 2,425
Scott County 21.9 1,077 1,734
Brown County 17.4 1,103 2,900
Pulaski County 21.1 1,114 2,059
Putnam County 20.5 1,153 2,267
Stark County 21.3 1,158 1,982
Henderson County 18.4 1,196 2,759
Schuyler County 17.4 1,210 2,902
Alexander County 22.7 1,246 1,387
Edwards County 22.7 1,416 1,383
Hamilton County 21.9 1,753 1,746
Jasper County 23.1 2,150 1,224
Cumberland County 22.8 2,404 1,326
Marshall County 20.7 2,435 2,190
Johnson County 19.2 2,548 2,597
Wabash County 22.3 2,551 1,524
Greene County 21.6 2,635 1,864
Mason County 20.8 2,756 2,142
Menard County 22.9 2,825 1,300
Washington County 21.2 2,926 2,035
Lawrence County 19.0 2,945 2,646
Carroll County 19.5 3,045 2,523
Clay County 23.0 3,064 1,243
White County 22.1 3,081 1,650
Ford County 23.0 3,131 1,232
Bond County 18.7 3,136 2,724
Massac County 22.0 3,147 1,665
Cass County 24.6 3,211 629
De Witt County 21.5 3,365 1,916
Edgar County 19.9 3,377 2,447
Mercer County 21.4 3,381 1,942
Pike County 22.8 3,402 1,339
Clark County 23.2 3,620 1,155
Union County 21.3 3,668 2,004
Warren County 21.8 3,680 1,785
Wayne County 22.8 3,703 1,342
Crawford County 19.7 3,709 2,479
Hancock County 20.9 3,716 2,105
Piatt County 22.4 3,738 1,489
Richland County 23.6 3,742 1,001
Moultrie County 25.7 3,762 386
Perry County 19.4 4,107 2,553
Jo Daviess County 19.0 4,184 2,650
Jersey County 20.4 4,390 2,291
Fayette County 21.2 4,570 2,008
Shelby County 21.7 4,590 1,825
McDonough County 17.3 4,809 2,913
Douglas County 25.0 4,919 526
Saline County 21.6 5,159 1,867
Logan County 19.4 5,465 2,566
Montgomery County 20.3 5,787 2,308
Randolph County 19.4 5,955 2,544
Iroquois County 22.0 6,019 1,680
Morgan County 19.2 6,367 2,616
Fulton County 19.8 6,736 2,462
Lee County 19.9 6,851 2,430
Bureau County 21.4 7,144 1,940
Christian County 21.2 7,221 2,013
Monroe County 22.4 7,771 1,511
Livingston County 21.9 7,865 1,723
Clinton County 21.4 7,935 1,945
Effingham County 24.1 8,324 791
Jefferson County 22.4 8,387 1,479
Franklin County 22.4 8,514 1,514
Coles County 18.2 8,646 2,804
Marion County 23.5 8,892 1,011
Woodford County 24.3 9,374 710
Macoupin County 21.2 9,574 2,016
Stephenson County 21.6 9,681 1,872
Knox County 20.0 10,042 2,404
Jackson County 18.9 10,124 2,681
Henry County 22.4 11,051 1,515
Ogle County 22.6 11,723 1,422
Whiteside County 22.2 12,398 1,612
Boone County 24.6 13,206 613
Grundy County 25.3 13,223 475
Williamson County 22.0 14,773 1,701
Adams County 22.8 14,996 1,355
Vermilion County 23.7 17,766 952
DeKalb County 21.7 21,885 1,828
Macon County 22.5 23,483 1,461
La Salle County 21.6 23,708 1,900
Kankakee County 22.9 24,768 1,287
Tazewell County 22.8 30,097 1,335
Rock Island County 22.5 32,557 1,464
McLean County 21.6 37,013 1,876
Kendall County 28.4 37,154 140
Champaign County 19.1 39,485 2,634
Peoria County 24.0 43,771 815
Sangamon County 22.3 43,924 1,539
Madison County 22.0 58,478 1,694
St. Clair County 23.7 61,160 969
Winnebago County 23.6 67,408 976
McHenry County 23.5 72,908 1,041
Kane County 25.3 131,408 461
Will County 24.8 172,426 577
Lake County 24.1 172,427 765
DuPage County 22.8 212,701 1,352
Cook County 21.9 1,151,647 1,739
Notes:
Created by statecancerprofiles.cancer.gov on 04/25/2024 9:05 am.
Source: Demographic data provided by the Census Bureau and the American Community Survey.
For more information about Population: Age under 18, see the dictionary.
Data for United States does not include Puerto Rico.

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