County in Illinois
Cass County
About 12,800 people, median household income $68,100.
Who lives in Cass County
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 12,800
- Median age
- 38.3 years
- Under 18
- 24%
- 65 and over
- 18%
- Veterans, of adults
- 6%
- Speak another language at home
- 22%
Race and ethnicity
- Hispanic or Latino, of any race
- 23%
- White, not Hispanic
- 70%
- Black, not Hispanic
- 4%
- Asian, not Hispanic
- 1%
Income and housing
- Median household income
- $68,100
- Below the poverty line
- 11%
- Bachelor's or higher, adults 25+
- 21%
- Owner-occupied homes
- 76%
- Median home value
- $97,000
2024 vote for president
- Donald Trump, Republican
- 70.8%
- Kamala Harris, Democrat
- 27.4%
- Other candidates
- 1.7%
Votes counted, by precinct. Source: MIT Election Data and Science Lab, precinct returns (public domain).
Represent all of Cass County
Cass County's districts
U.S. House District 15
All of Cass County
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 50
All of Cass County
Held by Jil Tracy, Republican
- Springfield office: (217) 782-2479
- District office: (217) 223-0833
About 214,400 people, median household income $71,300.
Largest towns: Quincy, Jacksonville, Godfrey (part) and 104 more
Illinois House District 99
All of Cass County
Held by Kyle Moore, Republican
- Springfield office: (217) 782-8096
- District office: (217) 223-0833
About 108,000 people, median household income $66,100.
Largest towns: Quincy, Jacksonville, Beardstown and 26 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 (5)
Cities, villages and unincorporated communities, with the number of people in the county’s part of each at the 2020 Census.
- Beardstown5,951
- Virginia1,514
- Ashland1,218
- Chandlerville527
- Arenzville367
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.