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Demographic Data Report for Illinois by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2015-2019 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 3146 counties)
 sort by rank ascending
Illinois 22.6 2,891,526 23 of 52
United States 22.6 73,429,392 N/A
Kendall County 28.8 36,346 124
Kane County 25.9 137,700 352
Grundy County 25.4 12,881 432
Will County 25.3 174,342 456
Boone County 25.2 13,514 463
Moultrie County 25.1 3,676 498
Douglas County 25.0 4,913 514
Lake County 24.5 171,546 657
Cass County 24.4 3,043 688
Woodford County 24.3 9,400 706
McHenry County 23.8 73,344 866
Peoria County 23.8 43,485 889
Vermilion County 23.8 18,438 903
Effingham County 23.7 8,094 934
St. Clair County 23.6 61,839 991
Winnebago County 23.6 67,090 999
Alexander County 23.3 1,457 1,109
Edwards County 23.2 1,499 1,131
Jasper County 23.2 2,226 1,141
Kankakee County 23.1 25,509 1,193
Clark County 23.1 3,623 1,204
Richland County 23.0 3,626 1,230
Marion County 23.0 8,675 1,235
Cumberland County 22.9 2,481 1,274
DuPage County 22.9 212,484 1,287
Tazewell County 22.8 30,374 1,318
Ford County 22.7 3,017 1,349
Clay County 22.7 3,017 1,362
Wayne County 22.7 3,723 1,369
Ogle County 22.7 11,560 1,388
Pike County 22.6 3,543 1,414
Adams County 22.6 14,921 1,422
Piatt County 22.5 3,696 1,443
Massac County 22.5 3,204 1,444
Sangamon County 22.4 44,187 1,480
Monroe County 22.4 7,642 1,510
Henry County 22.4 11,017 1,517
Rock Island County 22.3 32,134 1,525
Macon County 22.3 23,520 1,547
Whiteside County 22.3 12,476 1,563
Jefferson County 22.2 8,442 1,580
Wabash County 22.2 2,566 1,581
Hamilton County 22.2 1,812 1,613
Franklin County 22.1 8,618 1,620
Cook County 22.0 1,145,107 1,665
Madison County 22.0 58,145 1,694
Warren County 21.9 3,756 1,717
Scott County 21.9 1,096 1,720
Menard County 21.9 2,694 1,723
Pulaski County 21.9 1,206 1,724
Williamson County 21.9 14,682 1,728
Iroquois County 21.8 6,072 1,745
Saline County 21.7 5,196 1,820
McLean County 21.6 37,351 1,825
De Witt County 21.6 3,443 1,835
Washington County 21.6 3,038 1,836
La Salle County 21.6 23,713 1,837
Stephenson County 21.6 9,738 1,845
White County 21.6 2,994 1,848
DeKalb County 21.6 22,523 1,858
Mercer County 21.6 3,364 1,859
Stark County 21.6 1,174 1,871
Livingston County 21.5 7,762 1,879
Bureau County 21.4 7,097 1,930
Shelby County 21.3 4,634 1,979
Macoupin County 21.3 9,683 1,989
Clinton County 21.2 7,972 2,026
Union County 21.2 3,589 2,041
Hancock County 21.1 3,790 2,070
Calhoun County 20.9 1,009 2,127
Greene County 20.8 2,729 2,156
Jersey County 20.8 4,557 2,159
Mason County 20.7 2,817 2,191
Fayette County 20.7 4,454 2,203
Marshall County 20.5 2,395 2,254
Gallatin County 20.5 1,038 2,257
Christian County 20.5 6,746 2,264
Edgar County 20.3 3,529 2,335
Montgomery County 20.0 5,776 2,403
Fulton County 19.8 6,962 2,454
Crawford County 19.8 3,763 2,457
Lee County 19.8 6,812 2,466
Knox County 19.8 9,991 2,474
Putnam County 19.5 1,115 2,542
Carroll County 19.4 2,805 2,573
Logan County 19.3 5,607 2,592
Randolph County 19.2 6,215 2,614
Jo Daviess County 19.1 4,126 2,643
Bond County 19.1 3,161 2,661
Perry County 19.0 4,039 2,673
Morgan County 18.9 6,488 2,687
Champaign County 18.9 39,585 2,706
Schuyler County 18.8 1,304 2,724
Henderson County 18.5 1,258 2,768
Jackson County 18.4 10,646 2,791
Johnson County 18.1 2,264 2,824
Lawrence County 18.1 2,894 2,839
Coles County 18.0 9,255 2,845
Brown County 17.2 1,142 2,932
Hardin County 17.2 676 2,942
McDonough County 17.1 5,223 2,945
Pope County 14.9 626 3,094
Notes:
Created by statecancerprofiles.cancer.gov on 10/20/2021 3:31 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.
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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