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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 Name
County
 sort alphabetically by name descending
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
Adams County 22.8 14,996 1,355
Alexander County 22.7 1,246 1,387
Bond County 18.7 3,136 2,724
Boone County 24.6 13,206 613
Brown County 17.4 1,103 2,900
Bureau County 21.4 7,144 1,940
Calhoun County 20.2 917 2,337
Carroll County 19.5 3,045 2,523
Cass County 24.6 3,211 629
Champaign County 19.1 39,485 2,634
Christian County 21.2 7,221 2,013
Clark County 23.2 3,620 1,155
Clay County 23.0 3,064 1,243
Clinton County 21.4 7,935 1,945
Coles County 18.2 8,646 2,804
Cook County 21.9 1,151,647 1,739
Crawford County 19.7 3,709 2,479
Cumberland County 22.8 2,404 1,326
De Witt County 21.5 3,365 1,916
DeKalb County 21.7 21,885 1,828
Douglas County 25.0 4,919 526
DuPage County 22.8 212,701 1,352
Edgar County 19.9 3,377 2,447
Edwards County 22.7 1,416 1,383
Effingham County 24.1 8,324 791
Fayette County 21.2 4,570 2,008
Ford County 23.0 3,131 1,232
Franklin County 22.4 8,514 1,514
Fulton County 19.8 6,736 2,462
Gallatin County 19.9 1,005 2,425
Greene County 21.6 2,635 1,864
Grundy County 25.3 13,223 475
Hamilton County 21.9 1,753 1,746
Hancock County 20.9 3,716 2,105
Hardin County 13.8 511 3,109
Henderson County 18.4 1,196 2,759
Henry County 22.4 11,051 1,515
Iroquois County 22.0 6,019 1,680
Jackson County 18.9 10,124 2,681
Jasper County 23.1 2,150 1,224
Jefferson County 22.4 8,387 1,479
Jersey County 20.4 4,390 2,291
Jo Daviess County 19.0 4,184 2,650
Johnson County 19.2 2,548 2,597
Kane County 25.3 131,408 461
Kankakee County 22.9 24,768 1,287
Kendall County 28.4 37,154 140
Knox County 20.0 10,042 2,404
La Salle County 21.6 23,708 1,900
Lake County 24.1 172,427 765
Lawrence County 19.0 2,945 2,646
Lee County 19.9 6,851 2,430
Livingston County 21.9 7,865 1,723
Logan County 19.4 5,465 2,566
Macon County 22.5 23,483 1,461
Macoupin County 21.2 9,574 2,016
Madison County 22.0 58,478 1,694
Marion County 23.5 8,892 1,011
Marshall County 20.7 2,435 2,190
Mason County 20.8 2,756 2,142
Massac County 22.0 3,147 1,665
McDonough County 17.3 4,809 2,913
McHenry County 23.5 72,908 1,041
McLean County 21.6 37,013 1,876
Menard County 22.9 2,825 1,300
Mercer County 21.4 3,381 1,942
Monroe County 22.4 7,771 1,511
Montgomery County 20.3 5,787 2,308
Morgan County 19.2 6,367 2,616
Moultrie County 25.7 3,762 386
Ogle County 22.6 11,723 1,422
Peoria County 24.0 43,771 815
Perry County 19.4 4,107 2,553
Piatt County 22.4 3,738 1,489
Pike County 22.8 3,402 1,339
Pope County 18.1 693 2,813
Pulaski County 21.1 1,114 2,059
Putnam County 20.5 1,153 2,267
Randolph County 19.4 5,955 2,544
Richland County 23.6 3,742 1,001
Rock Island County 22.5 32,557 1,464
Saline County 21.6 5,159 1,867
Sangamon County 22.3 43,924 1,539
Schuyler County 17.4 1,210 2,902
Scott County 21.9 1,077 1,734
Shelby County 21.7 4,590 1,825
St. Clair County 23.7 61,160 969
Stark County 21.3 1,158 1,982
Stephenson County 21.6 9,681 1,872
Tazewell County 22.8 30,097 1,335
Union County 21.3 3,668 2,004
Vermilion County 23.7 17,766 952
Wabash County 22.3 2,551 1,524
Warren County 21.8 3,680 1,785
Washington County 21.2 2,926 2,035
Wayne County 22.8 3,703 1,342
White County 22.1 3,081 1,650
Whiteside County 22.2 12,398 1,612
Will County 24.8 172,426 577
Williamson County 22.0 14,773 1,701
Winnebago County 23.6 67,408 976
Woodford County 24.3 9,374 710
Notes:
Created by statecancerprofiles.cancer.gov on 03/28/2024 2:23 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.
Data for United States does not include Puerto Rico.

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