Winnebago County, Illinois

Winnebago County, Illinois, had an estimated population of 283,674 in 2025 across 1,329 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: 283,674; 2025 estimate
Area: 1,329 km²
Density: 213; per km²
Median income: $65,837; household, ACS 2024
Median age: 39.6; years, ACS 2024

How Illinois's counties spread

Amenities & Infrastructure

Indicator	Value	In Illinois	In the US
Households with Broadband2024	88.8%	29 / 102	1,119 / 3,144
Median Gross Rent2024	$1,021	17 / 102	922 / 3,137
Median Home Value2024	$164,500	29 / 102	1,915 / 3,139
Owner-Occupied Homes2024	65.9%	95 / 102	2,604 / 3,144
Vacant Homes2024	7.2%	85 / 102	2,645 / 3,144

Demography

Indicator	Value	In Illinois	In the US
Aged 65 and Over2024	18.5%	81 / 102	2,022 / 3,144
American Indian & Alaska Native2024	0.1%	18 / 102	1,566 / 3,144
Asian, non-Hispanic2024	2.9%	12 / 102	359 / 3,144
Average Household Size2024people	2.4	33 / 102	1,641 / 3,144
Black, non-Hispanic2024	11.6%	13 / 102	683 / 3,144
Foreign-Born2024	8.9%	11 / 102	473 / 3,144
Hispanic or Latino2024	15.5%	10 / 102	566 / 3,144
Median Age2024years	39.6	85 / 102	2,143 / 3,144
Sex Ratio2024per 1,000 males	1,044	15 / 102	584 / 3,144
Speak a Language Other Than English2024	15.2%	12 / 102	569 / 3,144
Under 182024	23.5%	13 / 102	848 / 3,144
Veterans2024	6.1%	83 / 102	2,273 / 3,144
White, non-Hispanic2024	63.8%	92 / 102	2,272 / 3,144

Economy

Indicator	Value	In Illinois	In the US
Below Poverty Line2024	15.6%	21 / 102	1,080 / 3,144
Households on SNAP2024	20.4%	6 / 102	372 / 3,144
Income Inequality2024index	0.450	27 / 102	1,413 / 3,144
Median Household Income2024	$65,837	59 / 102	1,560 / 3,143
Per Capita Income2024	$35,697	59 / 102	1,482 / 3,144
Unemployment Rate2024	7.3%	9 / 102	314 / 3,144

Education

Indicator	Value	In Illinois	In the US
Bachelor's Degree or Higher2024	25.2%	28 / 102	1,163 / 3,144
High School or Higher2024	88.8%	84 / 102	1,877 / 3,144

Health Coverage

Indicator	Value	In Illinois	In the US
No Health Insurance2024	6.2%	22 / 102	2,069 / 3,144
With a Disability2024	15.3%	55 / 102	1,762 / 3,144

Population & Density

Indicator	Value	In Illinois	In the US
Population2025	283,674	7 / 102	257 / 3,144
Population Density2025/km²	213	6 / 102	261 / 3,144

Work & Commute

Indicator	Value	In Illinois	In the US
Commute by Public Transit2024	0.5%	32 / 102	782 / 3,144
Households with No Vehicle2024	8.6%	17 / 102	438 / 3,144
Mean Commute Time2024minutes	23	64 / 102	1,830 / 3,143
Work from Home2024	9.8%	32 / 102	1,247 / 3,144

Other counties of Illinois

Compare Winnebago 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.