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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)
 sort by value descending
People (Age Under 18)
 sort by sample size ascending
Rank within US
(of 3146 counties)
 sort by rank ascending
United States 22.6 73,429,392 N/A
Illinois 22.6 2,891,526 23 of 52
Pope County 14.9 626 3,094
McDonough County 17.1 5,223 2,945
Hardin County 17.2 676 2,942
Brown County 17.2 1,142 2,932
Coles County 18.0 9,255 2,845
Lawrence County 18.1 2,894 2,839
Johnson County 18.1 2,264 2,824
Jackson County 18.4 10,646 2,791
Henderson County 18.5 1,258 2,768
Schuyler County 18.8 1,304 2,724
Champaign County 18.9 39,585 2,706
Morgan County 18.9 6,488 2,687
Perry County 19.0 4,039 2,673
Bond County 19.1 3,161 2,661
Jo Daviess County 19.1 4,126 2,643
Randolph County 19.2 6,215 2,614
Logan County 19.3 5,607 2,592
Carroll County 19.4 2,805 2,573
Putnam County 19.5 1,115 2,542
Knox County 19.8 9,991 2,474
Lee County 19.8 6,812 2,466
Crawford County 19.8 3,763 2,457
Fulton County 19.8 6,962 2,454
Montgomery County 20.0 5,776 2,403
Edgar County 20.3 3,529 2,335
Christian County 20.5 6,746 2,264
Gallatin County 20.5 1,038 2,257
Marshall County 20.5 2,395 2,254
Fayette County 20.7 4,454 2,203
Mason County 20.7 2,817 2,191
Jersey County 20.8 4,557 2,159
Greene County 20.8 2,729 2,156
Calhoun County 20.9 1,009 2,127
Hancock County 21.1 3,790 2,070
Union County 21.2 3,589 2,041
Clinton County 21.2 7,972 2,026
Macoupin County 21.3 9,683 1,989
Shelby County 21.3 4,634 1,979
Bureau County 21.4 7,097 1,930
Livingston County 21.5 7,762 1,879
Stark County 21.6 1,174 1,871
Mercer County 21.6 3,364 1,859
DeKalb County 21.6 22,523 1,858
White County 21.6 2,994 1,848
Stephenson County 21.6 9,738 1,845
La Salle County 21.6 23,713 1,837
Washington County 21.6 3,038 1,836
De Witt County 21.6 3,443 1,835
McLean County 21.6 37,351 1,825
Saline County 21.7 5,196 1,820
Iroquois County 21.8 6,072 1,745
Williamson County 21.9 14,682 1,728
Pulaski County 21.9 1,206 1,724
Menard County 21.9 2,694 1,723
Scott County 21.9 1,096 1,720
Warren County 21.9 3,756 1,717
Madison County 22.0 58,145 1,694
Cook County 22.0 1,145,107 1,665
Franklin County 22.1 8,618 1,620
Hamilton County 22.2 1,812 1,613
Wabash County 22.2 2,566 1,581
Jefferson County 22.2 8,442 1,580
Whiteside County 22.3 12,476 1,563
Macon County 22.3 23,520 1,547
Rock Island County 22.3 32,134 1,525
Henry County 22.4 11,017 1,517
Monroe County 22.4 7,642 1,510
Sangamon County 22.4 44,187 1,480
Massac County 22.5 3,204 1,444
Piatt County 22.5 3,696 1,443
Adams County 22.6 14,921 1,422
Pike County 22.6 3,543 1,414
Ogle County 22.7 11,560 1,388
Wayne County 22.7 3,723 1,369
Clay County 22.7 3,017 1,362
Ford County 22.7 3,017 1,349
Tazewell County 22.8 30,374 1,318
DuPage County 22.9 212,484 1,287
Cumberland County 22.9 2,481 1,274
Marion County 23.0 8,675 1,235
Richland County 23.0 3,626 1,230
Clark County 23.1 3,623 1,204
Kankakee County 23.1 25,509 1,193
Jasper County 23.2 2,226 1,141
Edwards County 23.2 1,499 1,131
Alexander County 23.3 1,457 1,109
Winnebago County 23.6 67,090 999
St. Clair County 23.6 61,839 991
Effingham County 23.7 8,094 934
Vermilion County 23.8 18,438 903
Peoria County 23.8 43,485 889
McHenry County 23.8 73,344 866
Woodford County 24.3 9,400 706
Cass County 24.4 3,043 688
Lake County 24.5 171,546 657
Douglas County 25.0 4,913 514
Moultrie County 25.1 3,676 498
Boone County 25.2 13,514 463
Will County 25.3 174,342 456
Grundy County 25.4 12,881 432
Kane County 25.9 137,700 352
Kendall County 28.8 36,346 124
Notes:
Created by statecancerprofiles.cancer.gov on 11/28/2021 10:19 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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