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County in Illinois

DeKalb County

About 100,700 people, median household income $70,700.

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

Who lives in DeKalb County

Census survey estimates for 2020 to 2024, rounded.

People

Population
100,700
Median age
32.7 years
Under 18
22%
65 and over
14%
Veterans, of adults
5%
Speak another language at home
12%

Race and ethnicity

Hispanic or Latino, of any race
15%
White, not Hispanic
71%
Black, not Hispanic
7%
Asian, not Hispanic
2%

Income and housing

Median household income
$70,700
Below the poverty line
15%
Bachelor's or higher, adults 25+
33%
Owner-occupied homes
61%
Median home value
$244,000

2024 vote for president

Kamala Harris, Democrat
49.9%
Donald Trump, Republican
47.9%
Other candidates
2.2%

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

Represent all of DeKalb County

DeKalb County's districts (12)

U.S. House (3)

Illinois Senate (4)

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.