Demographics Table
Demographic Data Report for Illinois by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2020-2024 American Community Survey 5-Year Data
Sorted by Percent
County
|
2023 Rural-Urban Continuum Codes Φ
|
Value (Percent)
|
People (Age Under 18)
|
Rank within US (of 3143 counties)
|
|---|---|---|---|---|
| Illinois | N/A | 21.8 | 2,773,339 | 25 of 52 |
| United States | N/A | 22.0 | 73,517,834 | N/A |
| Pope County | Rural | 14.4 | 539 | 3,075 |
| Hardin County | Rural | 14.8 | 533 | 3,054 |
| Brown County | Rural | 16.8 | 1,062 | 2,911 |
| Schuyler County | Rural | 17.0 | 1,153 | 2,883 |
| Bond County | Urban | 17.7 | 2,963 | 2,775 |
| Carroll County | Rural | 17.7 | 2,759 | 2,775 |
| McDonough County | Rural | 18.0 | 4,850 | 2,719 |
| Jo Daviess County | Rural | 18.2 | 3,972 | 2,692 |
| Coles County | Rural | 18.3 | 8,549 | 2,677 |
| Henderson County | Rural | 18.5 | 1,145 | 2,641 |
| Johnson County | Rural | 18.6 | 2,483 | 2,620 |
| Lawrence County | Rural | 18.6 | 2,796 | 2,620 |
| Jackson County | Rural | 18.8 | 9,994 | 2,580 |
| Morgan County | Rural | 18.9 | 6,252 | 2,564 |
| Champaign County | Urban | 19.1 | 39,863 | 2,518 |
| Christian County | Rural | 19.3 | 6,482 | 2,459 |
| Logan County | Rural | 19.3 | 5,338 | 2,459 |
| Perry County | Rural | 19.3 | 3,979 | 2,459 |
| Fulton County | Rural | 19.5 | 6,451 | 2,404 |
| Lee County | Rural | 19.6 | 6,655 | 2,372 |
| Putnam County | Rural | 19.7 | 1,103 | 2,348 |
| Edgar County | Rural | 19.8 | 3,275 | 2,323 |
| Jersey County | Urban | 19.8 | 4,207 | 2,323 |
| Calhoun County | Urban | 19.9 | 861 | 2,294 |
| Montgomery County | Rural | 20.1 | 5,621 | 2,226 |
| Crawford County | Rural | 20.2 | 3,746 | 2,193 |
| Knox County | Rural | 20.2 | 9,907 | 2,193 |
| Randolph County | Rural | 20.2 | 6,063 | 2,193 |
| Fayette County | Rural | 20.4 | 4,355 | 2,129 |
| Marshall County | Urban | 20.4 | 2,378 | 2,129 |
| Gallatin County | Rural | 20.5 | 986 | 2,095 |
| Macoupin County | Urban | 20.6 | 9,136 | 2,055 |
| Pulaski County | Rural | 20.6 | 1,032 | 2,055 |
| Bureau County | Rural | 20.7 | 6,799 | 2,021 |
| Saline County | Rural | 20.7 | 4,799 | 2,021 |
| Mason County | Rural | 20.8 | 2,647 | 1,978 |
| Mercer County | Urban | 20.8 | 3,230 | 1,978 |
| Washington County | Rural | 20.8 | 2,836 | 1,978 |
| Scott County | Rural | 20.9 | 1,030 | 1,936 |
| Hancock County | Rural | 21.0 | 3,635 | 1,910 |
| Wabash County | Rural | 21.0 | 2,331 | 1,910 |
| Cook County | Urban | 21.1 | 1,092,202 | 1,869 |
| La Salle County | Rural | 21.2 | 23,020 | 1,816 |
| McLean County | Urban | 21.2 | 36,391 | 1,816 |
| Stephenson County | Rural | 21.2 | 9,296 | 1,816 |
| Alexander County | Urban | 21.3 | 1,040 | 1,775 |
| De Witt County | Rural | 21.3 | 3,280 | 1,775 |
| Madison County | Urban | 21.3 | 56,348 | 1,775 |
| Massac County | Urban | 21.3 | 2,955 | 1,775 |
| Shelby County | Rural | 21.3 | 4,412 | 1,775 |
| Union County | Rural | 21.3 | 3,617 | 1,775 |
| Williamson County | Rural | 21.3 | 14,227 | 1,775 |
| Clinton County | Urban | 21.6 | 7,980 | 1,650 |
| DeKalb County | Urban | 21.6 | 21,723 | 1,650 |
| Henry County | Urban | 21.6 | 10,516 | 1,650 |
| Iroquois County | Rural | 21.6 | 5,703 | 1,650 |
| Piatt County | Urban | 21.6 | 3,608 | 1,650 |
| Stark County | Urban | 21.6 | 1,147 | 1,650 |
| White County | Rural | 21.7 | 2,957 | 1,613 |
| Monroe County | Urban | 21.8 | 7,651 | 1,576 |
| Hamilton County | Rural | 21.9 | 1,731 | 1,525 |
| Livingston County | Rural | 21.9 | 7,802 | 1,525 |
| Menard County | Urban | 21.9 | 2,643 | 1,525 |
| Sangamon County | Urban | 21.9 | 42,640 | 1,525 |
| Tazewell County | Urban | 21.9 | 28,584 | 1,525 |
| Edwards County | Rural | 22.0 | 1,338 | 1,478 |
| Greene County | Rural | 22.0 | 2,575 | 1,478 |
| Whiteside County | Rural | 22.0 | 12,065 | 1,478 |
| Franklin County | Rural | 22.1 | 8,240 | 1,441 |
| DuPage County | Urban | 22.2 | 206,075 | 1,395 |
| Ogle County | Rural | 22.2 | 11,430 | 1,395 |
| Jefferson County | Rural | 22.3 | 8,140 | 1,356 |
| Clark County | Rural | 22.4 | 3,412 | 1,311 |
| Cumberland County | Rural | 22.4 | 2,317 | 1,311 |
| Adams County | Rural | 22.5 | 14,578 | 1,260 |
| Jasper County | Rural | 22.5 | 2,069 | 1,260 |
| Rock Island County | Urban | 22.5 | 32,091 | 1,260 |
| Warren County | Rural | 22.5 | 3,693 | 1,260 |
| Wayne County | Rural | 22.5 | 3,592 | 1,260 |
| Macon County | Urban | 22.6 | 23,066 | 1,220 |
| McHenry County | Urban | 22.7 | 71,089 | 1,174 |
| Kankakee County | Urban | 22.8 | 24,272 | 1,133 |
| Richland County | Rural | 23.0 | 3,584 | 1,057 |
| St. Clair County | Urban | 23.0 | 58,413 | 1,057 |
| Pike County | Rural | 23.2 | 3,353 | 962 |
| Ford County | Urban | 23.3 | 3,130 | 926 |
| Lake County | Urban | 23.3 | 166,306 | 926 |
| Vermilion County | Rural | 23.4 | 16,954 | 889 |
| Marion County | Rural | 23.5 | 8,685 | 847 |
| Winnebago County | Urban | 23.5 | 66,531 | 847 |
| Will County | Urban | 23.6 | 165,564 | 809 |
| Boone County | Urban | 23.8 | 12,650 | 748 |
| Clay County | Rural | 23.8 | 3,111 | 748 |
| Effingham County | Rural | 23.9 | 8,265 | 717 |
| Kane County | Urban | 23.9 | 123,564 | 717 |
| Peoria County | Urban | 23.9 | 42,971 | 717 |
| Woodford County | Urban | 23.9 | 9,161 | 717 |
| Grundy County | Urban | 24.3 | 12,939 | 602 |
| Cass County | Rural | 24.4 | 3,119 | 573 |
| Douglas County | Rural | 24.6 | 4,859 | 514 |
| Moultrie County | Rural | 25.2 | 3,632 | 385 |
| Kendall County | Urban | 27.0 | 37,238 | 175 |
Notes:
Created by statecancerprofiles.cancer.gov on 03/21/2026 10:22 am.
Φ Rural–urban county classifications are based on the 2023 USDA Rural–Urban Continuum Codes (except for Connecticut Counties which use 2013 codes). State-level cancer rates for rural areas are calculated using cancer cases registered exclusively in rural counties, while state-level cancer rates for urban areas are calculated using cases registered exclusively in urban counties.
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.