County in Illinois
Coles County
About 46,800 people, median household income $56,500.
District lines run through Coles County, so who represents you here depends on where you live. Search your address to see yours.
Who lives in Coles County
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 46,800
- Median age
- 37.5 years
- Under 18
- 18%
- 65 and over
- 18%
- Veterans, of adults
- 6%
- Speak another language at home
- 5%
Race and ethnicity
- Hispanic or Latino, of any race
- 4%
- White, not Hispanic
- 88%
- Black, not Hispanic
- 4%
- Asian, not Hispanic
- 1%
Income and housing
- Median household income
- $56,500
- Below the poverty line
- 19%
- Bachelor's or higher, adults 25+
- 27%
- Owner-occupied homes
- 60%
- Median home value
- $127,000
2024 vote for president
- Donald Trump, Republican
- 63.3%
- Kamala Harris, Democrat
- 34.8%
- Other candidates
- 1.9%
Votes counted, by precinct. Source: MIT Election Data and Science Lab, precinct returns (public domain).
Represent all of Coles County
Coles County's districts
U.S. House District 12
Part of Coles County: 11,195 people in 2020
Held by Mike Bost, Republican
- Washington office: (202) 225-5661
About 746,800 people, median household income $68,500.
Largest towns: O'Fallon (part), Carbondale, Marion and 281 more
U.S. House District 15
Part of Coles County: 35,668 people in 2020
Held by Mary E. Miller, Republican
- Washington office: (202) 225-5271
About 746,700 people, median household income $74,000.
Largest towns: Quincy, Decatur (part), Springfield (part) and 351 more
Illinois Senate District 51
All of Coles County
Held by Chapin Rose, Republican
- Springfield office: (217) 558-1006
- District office: (217) 607-1853
About 216,500 people, median household income $70,900.
Largest towns: Charleston, Mattoon, Mahomet and 90 more
Illinois House District 101
Part of Coles County: 43,713 people in 2020
Held by Chris Miller, Republican
- Springfield office: (217) 558-1040
- District office: (217) 508-4108
About 109,200 people, median household income $72,300.
Largest towns: Charleston (part), Mattoon, Mahomet and 37 more
Illinois House District 102
Part of Coles County: 3,150 people in 2020
Held by Adam Niemerg, Republican
- Springfield office: (217) 782-2087
- District office: (217) 813-6036
About 107,300 people, median household income $69,600.
Largest towns: Paris, Robinson, Lawrenceville and 53 more
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.
- Charleston17,286
- Mattoon16,870
- Oakland739
- Ashmore637
- Humboldt361
- Lerna226
- Trilla (part)114
- Janesville (part)47
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.