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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 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 3143 counties)
 sort by rank ascending
Illinois 22.5 2,887,351 24 of 52
United States 22.5 74,234,075 N/A
Kendall County 28.4 37,154 140
Moultrie County 25.7 3,762 386
Kane County 25.3 131,408 461
Grundy County 25.3 13,223 475
Douglas County 25.0 4,919 526
Will County 24.8 172,426 577
Boone County 24.6 13,206 613
Cass County 24.6 3,211 629
Woodford County 24.3 9,374 710
Lake County 24.1 172,427 765
Effingham County 24.1 8,324 791
Peoria County 24.0 43,771 815
Vermilion County 23.7 17,766 952
St. Clair County 23.7 61,160 969
Winnebago County 23.6 67,408 976
Richland County 23.6 3,742 1,001
Marion County 23.5 8,892 1,011
McHenry County 23.5 72,908 1,041
Clark County 23.2 3,620 1,155
Jasper County 23.1 2,150 1,224
Ford County 23.0 3,131 1,232
Clay County 23.0 3,064 1,243
Kankakee County 22.9 24,768 1,287
Menard County 22.9 2,825 1,300
Cumberland County 22.8 2,404 1,326
Tazewell County 22.8 30,097 1,335
Pike County 22.8 3,402 1,339
Wayne County 22.8 3,703 1,342
DuPage County 22.8 212,701 1,352
Adams County 22.8 14,996 1,355
Edwards County 22.7 1,416 1,383
Alexander County 22.7 1,246 1,387
Ogle County 22.6 11,723 1,422
Macon County 22.5 23,483 1,461
Rock Island County 22.5 32,557 1,464
Jefferson County 22.4 8,387 1,479
Piatt County 22.4 3,738 1,489
Monroe County 22.4 7,771 1,511
Franklin County 22.4 8,514 1,514
Henry County 22.4 11,051 1,515
Wabash County 22.3 2,551 1,524
Sangamon County 22.3 43,924 1,539
Whiteside County 22.2 12,398 1,612
White County 22.1 3,081 1,650
Massac County 22.0 3,147 1,665
Iroquois County 22.0 6,019 1,680
Madison County 22.0 58,478 1,694
Williamson County 22.0 14,773 1,701
Livingston County 21.9 7,865 1,723
Scott County 21.9 1,077 1,734
Cook County 21.9 1,151,647 1,739
Hamilton County 21.9 1,753 1,746
Warren County 21.8 3,680 1,785
Shelby County 21.7 4,590 1,825
DeKalb County 21.7 21,885 1,828
Greene County 21.6 2,635 1,864
Saline County 21.6 5,159 1,867
Stephenson County 21.6 9,681 1,872
McLean County 21.6 37,013 1,876
La Salle County 21.6 23,708 1,900
De Witt County 21.5 3,365 1,916
Bureau County 21.4 7,144 1,940
Mercer County 21.4 3,381 1,942
Clinton County 21.4 7,935 1,945
Stark County 21.3 1,158 1,982
Union County 21.3 3,668 2,004
Fayette County 21.2 4,570 2,008
Christian County 21.2 7,221 2,013
Macoupin County 21.2 9,574 2,016
Washington County 21.2 2,926 2,035
Pulaski County 21.1 1,114 2,059
Hancock County 20.9 3,716 2,105
Mason County 20.8 2,756 2,142
Marshall County 20.7 2,435 2,190
Putnam County 20.5 1,153 2,267
Jersey County 20.4 4,390 2,291
Montgomery County 20.3 5,787 2,308
Calhoun County 20.2 917 2,337
Knox County 20.0 10,042 2,404
Gallatin County 19.9 1,005 2,425
Lee County 19.9 6,851 2,430
Edgar County 19.9 3,377 2,447
Fulton County 19.8 6,736 2,462
Crawford County 19.7 3,709 2,479
Carroll County 19.5 3,045 2,523
Randolph County 19.4 5,955 2,544
Perry County 19.4 4,107 2,553
Logan County 19.4 5,465 2,566
Johnson County 19.2 2,548 2,597
Morgan County 19.2 6,367 2,616
Champaign County 19.1 39,485 2,634
Lawrence County 19.0 2,945 2,646
Jo Daviess County 19.0 4,184 2,650
Jackson County 18.9 10,124 2,681
Bond County 18.7 3,136 2,724
Henderson County 18.4 1,196 2,759
Coles County 18.2 8,646 2,804
Pope County 18.1 693 2,813
Brown County 17.4 1,103 2,900
Schuyler County 17.4 1,210 2,902
McDonough County 17.3 4,809 2,913
Hardin County 13.8 511 3,109
Notes:
Created by statecancerprofiles.cancer.gov on 03/01/2024 10:12 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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