Cook County, Illinois

Cook County, Illinois, had an estimated population of 5,194,625 in 2025 across 2,447 km². The figures below come from the US Census Bureau's population estimates and the American Community Survey, each shown with its own vintage and its rank among Illinois's counties and nationally.

Population: 5,194,625; 2025 estimate
Area: 2,447 km²
Density: 2,123; per km²
Median income: $83,498; household, ACS 2024
Median age: 38; years, ACS 2024

How Illinois's counties spread

Amenities & Infrastructure

Indicator	Value	In Illinois	In the US
Households with Broadband2024	90.6%	14 / 102	686 / 3,144
Median Gross Rent2024	$1,435	6 / 102	284 / 3,137
Median Home Value2024	$324,500	4 / 102	511 / 3,139
Owner-Occupied Homes2024	57.7%	100 / 102	2,983 / 3,144
Vacant Homes2024	7.7%	81 / 102	2,571 / 3,144

Demography

Indicator	Value	In Illinois	In the US
Aged 65 and Over2024	16.0%	94 / 102	2,613 / 3,144
American Indian & Alaska Native2024	0.1%	18 / 102	1,566 / 3,144
Asian, non-Hispanic2024	7.9%	4 / 102	81 / 3,144
Average Household Size2024people	2.4	29 / 102	1,520 / 3,144
Black, non-Hispanic2024	21.8%	4 / 102	440 / 3,144
Foreign-Born2024	21.7%	1 / 102	101 / 3,144
Hispanic or Latino2024	26.8%	2 / 102	296 / 3,144
Median Age2024years	38	95 / 102	2,495 / 3,144
Sex Ratio2024per 1,000 males	1,049	9 / 102	516 / 3,144
Speak a Language Other Than English2024	35.8%	1 / 102	144 / 3,144
Under 182024	21.1%	61 / 102	1,870 / 3,144
Veterans2024	3.2%	102 / 102	3,072 / 3,144
White, non-Hispanic2024	40.1%	102 / 102	2,880 / 3,144

Economy

Indicator	Value	In Illinois	In the US
Below Poverty Line2024	13.5%	41 / 102	1,491 / 3,144
Households on SNAP2024	15.7%	34 / 102	833 / 3,144
Income Inequality2024index	0.504	3 / 102	205 / 3,144
Median Household Income2024	$83,498	14 / 102	467 / 3,143
Per Capita Income2024	$49,329	5 / 102	237 / 3,144
Unemployment Rate2024	7.0%	10 / 102	368 / 3,144

Education

Indicator	Value	In Illinois	In the US
Bachelor's Degree or Higher2024	42.7%	5 / 102	203 / 3,144
High School or Higher2024	88.6%	85 / 102	1,914 / 3,144

Health Coverage

Indicator	Value	In Illinois	In the US
No Health Insurance2024	8.9%	6 / 102	1,293 / 3,144
With a Disability2024	11.4%	90 / 102	2,809 / 3,144

Population & Density

Indicator	Value	In Illinois	In the US
Population2025	5,194,625	1 / 102	2 / 3,144
Population Density2025/km²	2,123	1 / 102	17 / 3,144

Work & Commute

Indicator	Value	In Illinois	In the US
Commute by Public Transit2024	11.8%	1 / 102	18 / 3,144
Households with No Vehicle2024	18.0%	1 / 102	32 / 3,144
Mean Commute Time2024minutes	31.5	3 / 102	330 / 3,143
Work from Home2024	18.9%	4 / 102	176 / 3,144

Other counties of Illinois

Compare Cook County against every other county on a map, add layers and run a scatter — open the atlas. Sources and vintages for every figure on this page are listed under datasets, or browse all 3,144 counties.