County in Illinois
Mason County
About 12,700 people, median household income $62,800.
District lines run through Mason County, so who represents you here depends on where you live. Search your address to see yours.
Who lives in Mason County
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 12,700
- Median age
- 45.4 years
- Under 18
- 21%
- 65 and over
- 23%
- Veterans, of adults
- 8%
- Speak another language at home
- 2%
Race and ethnicity
- Hispanic or Latino, of any race
- 2%
- White, not Hispanic
- 94%
- Black, not Hispanic
- 1%
- Asian, not Hispanic
- under 1%
Income and housing
- Median household income
- $62,800
- Below the poverty line
- 15%
- Bachelor's or higher, adults 25+
- 17%
- Owner-occupied homes
- 82%
- Median home value
- $103,000
2024 vote for president
- Donald Trump, Republican
- 70.0%
- Kamala Harris, Democrat
- 27.8%
- Other candidates
- 2.1%
Votes counted, by precinct. Source: MIT Election Data and Science Lab, precinct returns (public domain).
Represent all of Mason County
Mason County's districts
U.S. House District 15
All of Mason 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 44
Part of Mason County: 290 people in 2020
Held by Sally Turner, Republican
- Springfield office: (217) 782-6216
- District office: (217) 651-8291
About 215,000 people, median household income $86,200.
Largest towns: Bloomington (part), Morton (part), Decatur (part) and 74 more
Illinois Senate District 47
Part of Mason County: 12,796 people in 2020
Held by Neil Anderson, Republican
- Springfield office: (217) 782-5957
- District office: (309) 230-7584
Illinois House District 87
Part of Mason County: 290 people in 2020
Held by Bill Hauter, Republican
- Springfield office: (217) 782-0221
- District office: (309) 819-8701
About 107,500 people, median household income $78,900.
Largest towns: Morton (part), Lincoln, East Peoria (part) and 42 more
Illinois House District 94
Part of Mason County: 12,796 people in 2020
Held by Norine Hammond, Republican
- Springfield office: (217) 782-0416
- District office: (309) 836-2707
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 (10)
Cities, villages and unincorporated communities, with the number of people in the county’s part of each at the 2020 Census.
- Havana2,963
- Mason City2,077
- Manito1,552
- Easton312
- San Jose (part)290
- Bath279
- Kilbourne265
- Forest City222
- Goofy Ridge210
- Topeka60
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.