County in Illinois
Carroll County
About 15,600 people, median household income $60,800.
Who lives in Carroll County
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 15,600
- Median age
- 45.4 years
- Under 18
- 18%
- 65 and over
- 24%
- Veterans, of adults
- 9%
- Speak another language at home
- 6%
Race and ethnicity
- Hispanic or Latino, of any race
- 5%
- White, not Hispanic
- 88%
- Black, not Hispanic
- 4%
- Asian, not Hispanic
- 1%
Income and housing
- Median household income
- $60,800
- Below the poverty line
- 14%
- Bachelor's or higher, adults 25+
- 18%
- Owner-occupied homes
- 77%
- Median home value
- $115,000
2024 vote for president
- Donald Trump, Republican
- 64.8%
- Kamala Harris, Democrat
- 33.2%
- Other candidates
- 2.0%
Votes counted, by precinct. Source: MIT Election Data and Science Lab, precinct returns (public domain).
Represent all of Carroll County
Carroll County's districts
U.S. House District 17
All of Carroll County
Held by Eric Sorensen, Democratic
- Washington office: (202) 225-5905
About 746,000 people, median household income $59,400.
Largest towns: Rockford (part), Peoria (part), Bloomington (part) and 124 more
Illinois Senate District 45
All of Carroll County
Held by Andrew Chesney, Republican
- Springfield office: (217) 782-0180
- District office: (815) 232-0774
About 215,900 people, median household income $78,400.
Largest towns: Freeport, Machesney Park (part), Roscoe and 64 more
Illinois House District 89
All of Carroll County
Held by Tony McCombie, Republican
- Springfield office: (217) 782-3992
- District office: (815) 291-8989
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–2024; towns and counties from the 2020 Census, 119th Congressional District and 2024 state legislative district tabulation. 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.
Towns (8)
Cities, villages and unincorporated communities, with the number of people in the county’s part of each at the 2020 Census.
- Savanna2,783
- Thomson1,610
- Lanark1,504
- Mount Carroll1,479
- Milledgeville1,026
- Lake Carroll852
- Shannon801
- Chadwick481
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.