Demographics Table
Demographic Data Report for Illinois by County
Population: Age 40 and over
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 40 And Over)
|
Rank within US (of 3143 counties)
|
|---|---|---|---|---|
| Illinois | N/A | 48.7 | 6,180,674 | 29 of 52 |
| United States | N/A | 48.5 | 162,458,898 | N/A |
| Pope County | Rural | 69.4 | 2,596 | 25 |
| Hardin County | Rural | 62.5 | 2,253 | 151 |
| Schuyler County | Rural | 62.5 | 4,241 | 151 |
| Calhoun County | Urban | 61.5 | 2,664 | 192 |
| Jo Daviess County | Rural | 61.1 | 13,344 | 210 |
| Henderson County | Rural | 60.7 | 3,762 | 232 |
| Alexander County | Urban | 60.0 | 2,923 | 267 |
| Edgar County | Rural | 58.5 | 9,672 | 389 |
| Scott County | Rural | 57.6 | 2,846 | 484 |
| Putnam County | Rural | 57.4 | 3,213 | 515 |
| Carroll County | Rural | 57.3 | 8,923 | 527 |
| Gallatin County | Rural | 57.0 | 2,749 | 566 |
| Marshall County | Urban | 56.8 | 6,610 | 587 |
| Edwards County | Rural | 56.7 | 3,447 | 595 |
| Hancock County | Rural | 56.6 | 9,784 | 609 |
| Massac County | Urban | 56.2 | 7,795 | 652 |
| Mercer County | Urban | 55.9 | 8,666 | 695 |
| Stephenson County | Rural | 55.7 | 24,397 | 738 |
| Jasper County | Rural | 55.5 | 5,091 | 766 |
| Iroquois County | Rural | 55.4 | 14,652 | 781 |
| De Witt County | Rural | 55.3 | 8,507 | 799 |
| Macoupin County | Urban | 55.3 | 24,527 | 799 |
| Mason County | Rural | 55.3 | 7,049 | 799 |
| Shelby County | Rural | 55.3 | 11,453 | 799 |
| Union County | Rural | 55.2 | 9,379 | 824 |
| Fulton County | Rural | 55.0 | 18,164 | 853 |
| Hamilton County | Rural | 55.0 | 4,354 | 853 |
| Randolph County | Rural | 55.0 | 16,529 | 853 |
| White County | Rural | 55.0 | 7,495 | 853 |
| Bureau County | Rural | 54.9 | 18,047 | 869 |
| Stark County | Urban | 54.7 | 2,906 | 909 |
| Henry County | Urban | 54.5 | 26,499 | 952 |
| Greene County | Rural | 54.4 | 6,359 | 971 |
| Wayne County | Rural | 54.3 | 8,679 | 993 |
| Pulaski County | Rural | 54.2 | 2,719 | 1,019 |
| Washington County | Rural | 54.2 | 7,383 | 1,019 |
| Monroe County | Urban | 54.1 | 18,943 | 1,045 |
| Lee County | Rural | 54.0 | 18,297 | 1,065 |
| Wabash County | Rural | 54.0 | 6,003 | 1,065 |
| Franklin County | Rural | 53.9 | 20,100 | 1,083 |
| Christian County | Rural | 53.8 | 18,049 | 1,103 |
| Menard County | Urban | 53.8 | 6,511 | 1,103 |
| Crawford County | Rural | 53.7 | 9,947 | 1,138 |
| Cumberland County | Rural | 53.7 | 5,550 | 1,138 |
| Jersey County | Urban | 53.7 | 11,430 | 1,138 |
| Montgomery County | Rural | 53.7 | 14,999 | 1,138 |
| Knox County | Rural | 53.4 | 26,212 | 1,205 |
| Richland County | Rural | 53.4 | 8,322 | 1,205 |
| Saline County | Rural | 53.3 | 12,371 | 1,225 |
| Piatt County | Urban | 53.2 | 8,886 | 1,245 |
| Whiteside County | Rural | 53.1 | 29,194 | 1,267 |
| Clark County | Rural | 52.9 | 8,070 | 1,302 |
| Perry County | Rural | 52.8 | 10,905 | 1,325 |
| Pike County | Rural | 52.8 | 7,645 | 1,325 |
| La Salle County | Rural | 52.7 | 57,297 | 1,344 |
| Johnson County | Rural | 52.6 | 7,039 | 1,379 |
| Ogle County | Rural | 52.6 | 27,090 | 1,379 |
| Tazewell County | Urban | 52.6 | 68,516 | 1,379 |
| Livingston County | Rural | 52.5 | 18,667 | 1,412 |
| Fayette County | Rural | 52.3 | 11,143 | 1,461 |
| Adams County | Rural | 52.1 | 33,729 | 1,510 |
| Williamson County | Rural | 52.1 | 34,872 | 1,510 |
| Marion County | Rural | 52.0 | 19,251 | 1,544 |
| Clinton County | Urban | 51.9 | 19,191 | 1,570 |
| Brown County | Rural | 51.8 | 3,273 | 1,593 |
| Morgan County | Rural | 51.8 | 17,105 | 1,593 |
| Vermilion County | Rural | 51.8 | 37,525 | 1,593 |
| Lawrence County | Rural | 51.7 | 7,772 | 1,616 |
| Ford County | Urban | 51.6 | 6,918 | 1,641 |
| Logan County | Rural | 51.5 | 14,273 | 1,669 |
| Sangamon County | Urban | 51.5 | 100,461 | 1,669 |
| Jefferson County | Rural | 51.4 | 18,783 | 1,691 |
| McHenry County | Urban | 50.8 | 158,952 | 1,836 |
| Macon County | Urban | 50.7 | 51,641 | 1,858 |
| Woodford County | Urban | 50.6 | 19,376 | 1,884 |
| Clay County | Rural | 50.5 | 6,594 | 1,912 |
| Madison County | Urban | 50.3 | 132,795 | 1,962 |
| Rock Island County | Urban | 50.3 | 71,869 | 1,962 |
| DuPage County | Urban | 50.2 | 467,233 | 1,983 |
| Moultrie County | Rural | 50.2 | 7,234 | 1,983 |
| Effingham County | Rural | 50.0 | 17,245 | 2,034 |
| St. Clair County | Urban | 49.8 | 126,439 | 2,079 |
| Boone County | Urban | 49.7 | 26,461 | 2,095 |
| Bond County | Urban | 49.5 | 8,274 | 2,137 |
| Winnebago County | Urban | 49.5 | 140,260 | 2,137 |
| Kankakee County | Urban | 49.1 | 52,324 | 2,239 |
| Lake County | Urban | 48.8 | 348,668 | 2,287 |
| Warren County | Rural | 48.8 | 8,022 | 2,287 |
| Will County | Urban | 48.8 | 342,075 | 2,287 |
| Kane County | Urban | 48.5 | 250,897 | 2,339 |
| Cass County | Rural | 47.9 | 6,121 | 2,429 |
| Douglas County | Rural | 47.8 | 9,436 | 2,442 |
| Peoria County | Urban | 47.7 | 85,619 | 2,458 |
| Coles County | Rural | 47.5 | 22,200 | 2,485 |
| Grundy County | Urban | 47.3 | 25,183 | 2,512 |
| Cook County | Urban | 47.1 | 2,441,146 | 2,541 |
| McDonough County | Rural | 44.7 | 12,040 | 2,794 |
| Kendall County | Urban | 44.6 | 61,384 | 2,797 |
| McLean County | Urban | 42.9 | 73,534 | 2,911 |
| Jackson County | Rural | 41.3 | 21,890 | 2,976 |
| DeKalb County | Urban | 40.7 | 40,948 | 3,003 |
| Champaign County | Urban | 38.7 | 80,798 | 3,067 |
Notes:
Created by statecancerprofiles.cancer.gov on 03/29/2026 7:03 pm.
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 40 and over, see the dictionary.
Data for United States does not include Puerto Rico.