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County in Illinois

Madison County

About 264,200 people, median household income $75,800.

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

Who lives in Madison County

Census survey estimates for 2020 to 2024, rounded.

People

Population
264,200
Median age
40.2 years
Under 18
21%
65 and over
19%
Veterans, of adults
8%
Speak another language at home
4%

Race and ethnicity

Hispanic or Latino, of any race
4%
White, not Hispanic
82%
Black, not Hispanic
8%
Asian, not Hispanic
1%

Income and housing

Median household income
$75,800
Below the poverty line
11%
Bachelor's or higher, adults 25+
31%
Owner-occupied homes
74%
Median home value
$173,000

2024 vote for president

Donald Trump, Republican
55.6%
Kamala Harris, Democrat
42.3%
Other candidates
2.1%

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

Represent all of Madison County

Madison County's districts (11)

U.S. House (2)

Illinois Senate (4)

Illinois House (5)

Towns (34)

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

10 more towns

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.