County in Illinois
Shelby County
About 20,700 people, median household income $72,100.
Who lives in Shelby County
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 20,700
- Median age
- 45.3 years
- Under 18
- 21%
- 65 and over
- 24%
- Veterans, of adults
- 10%
- Speak another language at home
- 2%
Race and ethnicity
- Hispanic or Latino, of any race
- 1%
- White, not Hispanic
- 96%
- Black, not Hispanic
- under 1%
- Asian, not Hispanic
- under 1%
Income and housing
- Median household income
- $72,100
- Below the poverty line
- 9%
- Bachelor's or higher, adults 25+
- 18%
- Owner-occupied homes
- 78%
- Median home value
- $137,000
2024 vote for president
- Donald Trump, Republican
- 79.4%
- Kamala Harris, Democrat
- 19.2%
- Other candidates
- 1.4%
Votes counted, by precinct. Source: MIT Election Data and Science Lab, precinct returns (public domain).
Represent all of Shelby County
Shelby County's districts
U.S. House District 15
All of Shelby 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 54
All of Shelby County
Held by Steve McClure, Republican
- Springfield office: (217) 782-8206
- District office: (217) 960-0788
About 214,100 people, median household income $76,900.
Largest towns: Effingham, Taylorville, Litchfield and 95 more
Illinois House District 107
All of Shelby County
Held by Brad Halbrook, Republican
- Springfield office: (217) 782-8398
- District office: (217) 342-0220
About 107,100 people, median household income $73,800.
Largest towns: Effingham, Taylorville, Mount Zion (part) and 39 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 (14)
Cities, villages and unincorporated communities, with the number of people in the county’s part of each at the 2020 Census.
- Shelbyville4,674
- Moweaqua (part)1,754
- Windsor1,079
- Stewardson721
- Findlay664
- Strasburg531
- Cowden515
- Tower Hill485
- Herrick358
- Sigel329
- Oconee141
- Westervelt131
- Pana (part)107
- Lakewood91
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.