Counties of Illinois
Illinois has 102 counties, home to 12,719,141 people across 143,779 km². Each county below opens its full profile — Census Bureau and American Community Survey figures, and how it ranks against the rest of Illinois and the country.
- Counties
- 102
- Population
- 12,719,141
- 2025 estimate
- #6 of 51 states
- Area
- 143,779 km²
- #24 of 51 states
- Density
- 88
- per km²
- #14 of 51 states
How Illinois's counties spread
Across Illinois's counties: the middle value, where the state ranks among all states (1 = highest median), and which county is highest and lowest. Medians rather than totals, since most of these are rates that cannot be added up.
Amenities & Infrastructure
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Households with Broadband2024 | 86.9% | 32 / 50 | Kendall County95.6% | Pulaski County61.1% |
| Median Gross Rent2024 | $811 | 40 / 50 | Kendall County$1,781 | Hardin County$379 |
| Median Home Value2024 | $134,650 | 48 / 50 | DuPage County$391,400 | Alexander County$59,800 |
| Owner-Occupied Homes2024 | 76.8% | 8 / 50 | Calhoun County88.7% | Jackson County50.0% |
| Vacant Homes2024 | 10.8% | 38 / 50 | Calhoun County46.1% | Kendall County2.6% |
Demography
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Aged 65 and Over2024 | 20.6% | 26 / 50 | Jo Daviess County29.9% | Kendall County11.2% |
| American Indian & Alaska Native2024 | 0.1% | 29 / 50 | Bond County1.0% | Coles County0.0% |
| Asian, non-Hispanic2024 | 0.6% | 28 / 50 | DuPage County13.0% | Cumberland County0.0% |
| Average Household Size2024people | 2.3 | 41 / 50 | Calhoun County3.4 | McDonough County2.1 |
| Black, non-Hispanic2024 | 2.6% | 18 / 50 | Pulaski County33.6% | Jasper County0.1% |
| Foreign-Born2024 | 1.6% | 44 / 50 | Cook County21.7% | Cumberland County0.2% |
| Hispanic or Latino2024 | 3.0% | 39 / 50 | Kane County33.4% | Cumberland County0.4% |
| Median Age2024years | 42.6 | 18 / 50 | Pope County53.9 | Champaign County30.7 |
| Sex Ratio2024per 1,000 males | 1,001 | 26 / 50 | Macon County1,077 | Brown County565 |
| Speak a Language Other Than English2024 | 3.1% | 45 / 50 | Cook County35.8% | Hardin County0.3% |
| Under 182024 | 21.3% | 26 / 50 | Kendall County27.0% | Pope County14.4% |
| Veterans2024 | 7.3% | 22 / 50 | St. Clair County11.5% | Cook County3.2% |
| White, non-Hispanic2024 | 88.2% | 16 / 50 | Jasper County96.8% | Cook County40.1% |
Economy
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Below Poverty Line2024 | 12.6% | 22 / 50 | Pulaski County25.0% | Monroe County5.0% |
| Households on SNAP2024 | 14.4% | 12 / 50 | Alexander County26.8% | Monroe County4.4% |
| Income Inequality2024index | 0.433 | 39 / 50 | Saline County0.525 | Kendall County0.361 |
| Median Household Income2024 | $66,532 | 31 / 50 | DuPage County$112,096 | Pulaski County$42,463 |
| Per Capita Income2024 | $36,546 | 28 / 50 | DuPage County$58,189 | Pulaski County$24,074 |
| Unemployment Rate2024 | 4.4% | 31 / 50 | Gallatin County9.2% | Cumberland County1.4% |
Education
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Bachelor's Degree or Higher2024 | 20.9% | 34 / 50 | DuPage County51.8% | Alexander County12.6% |
| High School or Higher2024 | 91.7% | 25 / 50 | Piatt County96.2% | Brown County76.7% |
Health Coverage
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| No Health Insurance2024 | 5.1% | 40 / 50 | Douglas County15.4% | Brown County2.1% |
| With a Disability2024 | 15.6% | 24 / 50 | Hardin County27.4% | Kendall County8.2% |
Population & Density
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Population2025 | 24,344 | 30 / 50 | Cook County5,194,625 | Hardin County3,588 |
| Population Density2025/km² | 17 | 27 / 50 | Cook County2,123 | Pope County4 |
Work & Commute
| Indicator | Median | Rank | Highest | Lowest |
|---|---|---|---|---|
| Commute by Public Transit2024 | 0.3% | 18 / 50 | Cook County11.8% | Scott County0.0% |
| Households with No Vehicle2024 | 5.8% | 20 / 50 | Cook County18.0% | Piatt County2.1% |
| Mean Commute Time2024minutes | 24.2 | 26 / 50 | Calhoun County47.7 | Brown County15.9 |
| Work from Home2024 | 8.0% | 36 / 50 | DuPage County21.5% | Hardin County2.2% |
All counties
| County | Population 2025 | Area | Median income |
|---|---|---|---|
| Adams County | 64,267 | 2,215 km² | $66,220 |
| Alexander County | 4,570 | 610 km² | $47,043 |
| Bond County | 16,959 | 985 km² | $65,959 |
| Boone County | 53,568 | 727 km² | $84,571 |
| Brown County | 6,401 | 792 km² | $67,917 |
| Bureau County | 32,510 | 2,251 km² | $69,257 |
| Calhoun County | 4,300 | 657 km² | $93,203 |
| Carroll County | 15,419 | 1,154 km² | $60,758 |
| Cass County | 12,463 | 973 km² | $68,125 |
| Champaign County | 209,972 | 2,580 km² | $63,683 |
| Christian County | 33,443 | 1,838 km² | $62,611 |
| Clark County | 15,114 | 1,299 km² | $72,927 |
| Clay County | 12,793 | 1,213 km² | $60,417 |
| Clinton County | 37,128 | 1,228 km² | $86,588 |
| Coles County | 46,607 | 1,316 km² | $56,478 |
| Cook County | 5,194,625 | 2,447 km² | $83,498 |
| Crawford County | 18,648 | 1,149 km² | $71,674 |
| Cumberland County | 10,208 | 896 km² | $73,327 |
| De Witt County | 15,118 | 1,030 km² | $71,678 |
| DeKalb County | 101,835 | 1,635 km² | $70,724 |
| Douglas County | 19,880 | 1,079 km² | $77,320 |
| DuPage County | 934,298 | 849 km² | $112,096 |
| Edgar County | 16,323 | 1,614 km² | $59,941 |
| Edwards County | 5,898 | 576 km² | $60,519 |
| Effingham County | 34,519 | 1,240 km² | $80,404 |
| Fayette County | 20,790 | 1,856 km² | $60,944 |
| Ford County | 13,216 | 1,258 km² | $62,439 |
| Franklin County | 36,916 | 1,059 km² | $56,740 |
| Fulton County | 32,901 | 2,242 km² | $60,599 |
| Gallatin County | 4,616 | 836 km² | $59,219 |
| Greene County | 11,313 | 1,407 km² | $62,192 |
| Grundy County | 54,052 | 1,083 km² | $92,235 |
| Hamilton County | 7,859 | 1,126 km² | $65,746 |
| Hancock County | 16,803 | 2,056 km² | $65,865 |
| Hardin County | 3,588 | 459 km² | $54,271 |
| Henderson County | 5,984 | 981 km² | $62,227 |
| Henry County | 48,095 | 2,132 km² | $71,911 |
| Iroquois County | 26,150 | 2,894 km² | $66,255 |
| Jackson County | 52,501 | 1,511 km² | $48,763 |
| Jasper County | 9,032 | 1,281 km² | $74,755 |
| Jefferson County | 36,147 | 1,479 km² | $63,118 |
| Jersey County | 21,160 | 957 km² | $80,361 |
| Jo Daviess County | 21,594 | 1,556 km² | $73,993 |
| Johnson County | 13,363 | 890 km² | $62,528 |
| Kane County | 525,757 | 1,345 km² | $103,163 |
| Kankakee County | 105,525 | 1,752 km² | $71,281 |
| Kendall County | 145,470 | 829 km² | $111,601 |
| Knox County | 47,767 | 1,855 km² | $57,030 |
| LaSalle County | 107,773 | 2,940 km² | $73,045 |
| Lake County | 719,339 | 1,149 km² | $110,416 |
| Lawrence County | 13,790 | 964 km² | $55,324 |
| Lee County | 32,914 | 1,877 km² | $70,292 |
| Livingston County | 35,057 | 2,703 km² | $73,790 |
| Logan County | 27,182 | 1,601 km² | $66,358 |
| Macon County | 99,300 | 1,504 km² | $62,666 |
| Macoupin County | 43,748 | 2,235 km² | $70,805 |
| Madison County | 263,110 | 1,853 km² | $75,793 |
| Marion County | 36,382 | 1,483 km² | $61,240 |
| Marshall County | 11,473 | 1,002 km² | $71,585 |
| Mason County | 12,411 | 1,397 km² | $62,845 |
| Massac County | 13,502 | 614 km² | $65,116 |
| McDonough County | 25,916 | 1,526 km² | $52,795 |
| McHenry County | 317,751 | 1,563 km² | $104,802 |
| McLean County | 171,419 | 3,065 km² | $79,905 |
| Menard County | 11,863 | 814 km² | $82,176 |
| Mercer County | 15,229 | 1,454 km² | $74,182 |
| Monroe County | 34,840 | 998 km² | $102,880 |
| Montgomery County | 28,076 | 1,823 km² | $63,620 |
| Morgan County | 32,515 | 1,474 km² | $66,306 |
| Moultrie County | 14,371 | 870 km² | $71,784 |
| Ogle County | 51,399 | 1,965 km² | $82,132 |
| Peoria County | 178,553 | 1,602 km² | $65,108 |
| Perry County | 20,160 | 1,145 km² | $62,118 |
| Piatt County | 16,791 | 1,137 km² | $94,811 |
| Pike County | 14,231 | 2,153 km² | $59,777 |
| Pope County | 3,672 | 955 km² | $60,050 |
| Pulaski County | 4,820 | 516 km² | $42,463 |
| Putnam County | 5,619 | 415 km² | $75,590 |
| Randolph County | 29,921 | 1,490 km² | $68,131 |
| Richland County | 15,219 | 933 km² | $62,455 |
| Rock Island County | 141,869 | 1,107 km² | $67,159 |
| Saline County | 22,772 | 984 km² | $53,117 |
| Sangamon County | 194,170 | 2,249 km² | $75,357 |
| Schuyler County | 6,657 | 1,133 km² | $65,948 |
| Scott County | 4,866 | 650 km² | $66,705 |
| Shelby County | 20,576 | 1,965 km² | $72,095 |
| St. Clair County | 250,708 | 1,704 km² | $73,854 |
| Stark County | 5,319 | 746 km² | $62,878 |
| Stephenson County | 43,220 | 1,461 km² | $64,043 |
| Tazewell County | 130,049 | 1,674 km² | $77,982 |
| Union County | 16,656 | 1,071 km² | $55,728 |
| Vermilion County | 71,259 | 2,327 km² | $56,877 |
| Wabash County | 10,907 | 578 km² | $57,086 |
| Warren County | 16,222 | 1,405 km² | $67,385 |
| Washington County | 13,564 | 1,457 km² | $78,224 |
| Wayne County | 15,882 | 1,849 km² | $55,521 |
| White County | 13,250 | 1,282 km² | $54,813 |
| Whiteside County | 54,121 | 1,772 km² | $67,500 |
| Will County | 712,253 | 2,165 km² | $109,984 |
| Williamson County | 67,225 | 1,088 km² | $65,604 |
| Winnebago County | 283,674 | 1,329 km² | $65,837 |
| Woodford County | 38,111 | 1,366 km² | $91,483 |
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