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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 Name
County
 sort alphabetically by name descending
Value (Percent)
 sort by value ascending
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
Adams County 22.6 14,921 1,422
Alexander County 23.3 1,457 1,109
Bond County 19.1 3,161 2,661
Boone County 25.2 13,514 463
Brown County 17.2 1,142 2,932
Bureau County 21.4 7,097 1,930
Calhoun County 20.9 1,009 2,127
Carroll County 19.4 2,805 2,573
Cass County 24.4 3,043 688
Champaign County 18.9 39,585 2,706
Christian County 20.5 6,746 2,264
Clark County 23.1 3,623 1,204
Clay County 22.7 3,017 1,362
Clinton County 21.2 7,972 2,026
Coles County 18.0 9,255 2,845
Cook County 22.0 1,145,107 1,665
Crawford County 19.8 3,763 2,457
Cumberland County 22.9 2,481 1,274
De Witt County 21.6 3,443 1,835
DeKalb County 21.6 22,523 1,858
Douglas County 25.0 4,913 514
DuPage County 22.9 212,484 1,287
Edgar County 20.3 3,529 2,335
Edwards County 23.2 1,499 1,131
Effingham County 23.7 8,094 934
Fayette County 20.7 4,454 2,203
Ford County 22.7 3,017 1,349
Franklin County 22.1 8,618 1,620
Fulton County 19.8 6,962 2,454
Gallatin County 20.5 1,038 2,257
Greene County 20.8 2,729 2,156
Grundy County 25.4 12,881 432
Hamilton County 22.2 1,812 1,613
Hancock County 21.1 3,790 2,070
Hardin County 17.2 676 2,942
Henderson County 18.5 1,258 2,768
Henry County 22.4 11,017 1,517
Iroquois County 21.8 6,072 1,745
Jackson County 18.4 10,646 2,791
Jasper County 23.2 2,226 1,141
Jefferson County 22.2 8,442 1,580
Jersey County 20.8 4,557 2,159
Jo Daviess County 19.1 4,126 2,643
Johnson County 18.1 2,264 2,824
Kane County 25.9 137,700 352
Kankakee County 23.1 25,509 1,193
Kendall County 28.8 36,346 124
Knox County 19.8 9,991 2,474
La Salle County 21.6 23,713 1,837
Lake County 24.5 171,546 657
Lawrence County 18.1 2,894 2,839
Lee County 19.8 6,812 2,466
Livingston County 21.5 7,762 1,879
Logan County 19.3 5,607 2,592
Macon County 22.3 23,520 1,547
Macoupin County 21.3 9,683 1,989
Madison County 22.0 58,145 1,694
Marion County 23.0 8,675 1,235
Marshall County 20.5 2,395 2,254
Mason County 20.7 2,817 2,191
Massac County 22.5 3,204 1,444
McDonough County 17.1 5,223 2,945
McHenry County 23.8 73,344 866
McLean County 21.6 37,351 1,825
Menard County 21.9 2,694 1,723
Mercer County 21.6 3,364 1,859
Monroe County 22.4 7,642 1,510
Montgomery County 20.0 5,776 2,403
Morgan County 18.9 6,488 2,687
Moultrie County 25.1 3,676 498
Ogle County 22.7 11,560 1,388
Peoria County 23.8 43,485 889
Perry County 19.0 4,039 2,673
Piatt County 22.5 3,696 1,443
Pike County 22.6 3,543 1,414
Pope County 14.9 626 3,094
Pulaski County 21.9 1,206 1,724
Putnam County 19.5 1,115 2,542
Randolph County 19.2 6,215 2,614
Richland County 23.0 3,626 1,230
Rock Island County 22.3 32,134 1,525
Saline County 21.7 5,196 1,820
Sangamon County 22.4 44,187 1,480
Schuyler County 18.8 1,304 2,724
Scott County 21.9 1,096 1,720
Shelby County 21.3 4,634 1,979
St. Clair County 23.6 61,839 991
Stark County 21.6 1,174 1,871
Stephenson County 21.6 9,738 1,845
Tazewell County 22.8 30,374 1,318
Union County 21.2 3,589 2,041
Vermilion County 23.8 18,438 903
Wabash County 22.2 2,566 1,581
Warren County 21.9 3,756 1,717
Washington County 21.6 3,038 1,836
Wayne County 22.7 3,723 1,369
White County 21.6 2,994 1,848
Whiteside County 22.3 12,476 1,563
Will County 25.3 174,342 456
Williamson County 21.9 14,682 1,728
Winnebago County 23.6 67,090 999
Woodford County 24.3 9,400 706
Notes:
Created by statecancerprofiles.cancer.gov on 01/20/2022 2:23 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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