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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 Count
County
 sort alphabetically by name ascending
Value (Percent)
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People (Age Under 18)
 sort by sample size descending
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
Pope County 14.9 626 3,094
Hardin County 17.2 676 2,942
Calhoun County 20.9 1,009 2,127
Gallatin County 20.5 1,038 2,257
Scott County 21.9 1,096 1,720
Putnam County 19.5 1,115 2,542
Brown County 17.2 1,142 2,932
Stark County 21.6 1,174 1,871
Pulaski County 21.9 1,206 1,724
Henderson County 18.5 1,258 2,768
Schuyler County 18.8 1,304 2,724
Alexander County 23.3 1,457 1,109
Edwards County 23.2 1,499 1,131
Hamilton County 22.2 1,812 1,613
Jasper County 23.2 2,226 1,141
Johnson County 18.1 2,264 2,824
Marshall County 20.5 2,395 2,254
Cumberland County 22.9 2,481 1,274
Wabash County 22.2 2,566 1,581
Menard County 21.9 2,694 1,723
Greene County 20.8 2,729 2,156
Carroll County 19.4 2,805 2,573
Mason County 20.7 2,817 2,191
Lawrence County 18.1 2,894 2,839
White County 21.6 2,994 1,848
Clay County 22.7 3,017 1,362
Ford County 22.7 3,017 1,349
Washington County 21.6 3,038 1,836
Cass County 24.4 3,043 688
Bond County 19.1 3,161 2,661
Massac County 22.5 3,204 1,444
Mercer County 21.6 3,364 1,859
De Witt County 21.6 3,443 1,835
Edgar County 20.3 3,529 2,335
Pike County 22.6 3,543 1,414
Union County 21.2 3,589 2,041
Clark County 23.1 3,623 1,204
Richland County 23.0 3,626 1,230
Moultrie County 25.1 3,676 498
Piatt County 22.5 3,696 1,443
Wayne County 22.7 3,723 1,369
Warren County 21.9 3,756 1,717
Crawford County 19.8 3,763 2,457
Hancock County 21.1 3,790 2,070
Perry County 19.0 4,039 2,673
Jo Daviess County 19.1 4,126 2,643
Fayette County 20.7 4,454 2,203
Jersey County 20.8 4,557 2,159
Shelby County 21.3 4,634 1,979
Douglas County 25.0 4,913 514
Saline County 21.7 5,196 1,820
McDonough County 17.1 5,223 2,945
Logan County 19.3 5,607 2,592
Montgomery County 20.0 5,776 2,403
Iroquois County 21.8 6,072 1,745
Randolph County 19.2 6,215 2,614
Morgan County 18.9 6,488 2,687
Christian County 20.5 6,746 2,264
Lee County 19.8 6,812 2,466
Fulton County 19.8 6,962 2,454
Bureau County 21.4 7,097 1,930
Monroe County 22.4 7,642 1,510
Livingston County 21.5 7,762 1,879
Clinton County 21.2 7,972 2,026
Effingham County 23.7 8,094 934
Jefferson County 22.2 8,442 1,580
Franklin County 22.1 8,618 1,620
Marion County 23.0 8,675 1,235
Coles County 18.0 9,255 2,845
Woodford County 24.3 9,400 706
Macoupin County 21.3 9,683 1,989
Stephenson County 21.6 9,738 1,845
Knox County 19.8 9,991 2,474
Jackson County 18.4 10,646 2,791
Henry County 22.4 11,017 1,517
Ogle County 22.7 11,560 1,388
Whiteside County 22.3 12,476 1,563
Grundy County 25.4 12,881 432
Boone County 25.2 13,514 463
Williamson County 21.9 14,682 1,728
Adams County 22.6 14,921 1,422
Vermilion County 23.8 18,438 903
DeKalb County 21.6 22,523 1,858
Macon County 22.3 23,520 1,547
La Salle County 21.6 23,713 1,837
Kankakee County 23.1 25,509 1,193
Tazewell County 22.8 30,374 1,318
Rock Island County 22.3 32,134 1,525
Kendall County 28.8 36,346 124
McLean County 21.6 37,351 1,825
Champaign County 18.9 39,585 2,706
Peoria County 23.8 43,485 889
Sangamon County 22.4 44,187 1,480
Madison County 22.0 58,145 1,694
St. Clair County 23.6 61,839 991
Winnebago County 23.6 67,090 999
McHenry County 23.8 73,344 866
Kane County 25.9 137,700 352
Lake County 24.5 171,546 657
Will County 25.3 174,342 456
DuPage County 22.9 212,484 1,287
Cook County 22.0 1,145,107 1,665
Notes:
Created by statecancerprofiles.cancer.gov on 01/26/2022 7:51 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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