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County in Illinois

Winnebago County

About 283,300 people, median household income $65,800.

District lines run through Winnebago County, so who represents you here depends on where you live. Search your address to see yours.

Who lives in Winnebago County

Census survey estimates for 2020 to 2024, rounded.

People

Population
283,300
Median age
39.6 years
Under 18
24%
65 and over
19%
Veterans, of adults
6%
Speak another language at home
15%

Race and ethnicity

Hispanic or Latino, of any race
16%
White, not Hispanic
64%
Black, not Hispanic
12%
Asian, not Hispanic
3%

Income and housing

Median household income
$65,800
Below the poverty line
16%
Bachelor's or higher, adults 25+
25%
Owner-occupied homes
66%
Median home value
$165,000

2024 vote for president

Kamala Harris, Democrat
49.3%
Donald Trump, Republican
48.7%
Other candidates
1.9%

Votes counted, by precinct. Source: MIT Election Data and Science Lab, precinct returns (public domain).

Represent all of Winnebago County

Winnebago County's districts (10)

U.S. House (2)

Illinois Senate (3)

Illinois House (5)

Towns (14)

Cities, villages and unincorporated communities, with the number of people in the county’s part of each at the 2020 Census.

Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–2024; towns and counties from the 2020 Census, Demographic and Housing Characteristics. Figures rounded by us. Retrieved 2026-10-19. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.