County in Illinois
Stephenson County
About 43,800 people, median household income $64,000.
District lines run through Stephenson County, so who represents you here depends on where you live. Search your address to see yours.
Who lives in Stephenson County
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 43,800
- Median age
- 45.3 years
- Under 18
- 21%
- 65 and over
- 24%
- Veterans, of adults
- 8%
- Speak another language at home
- 4%
Race and ethnicity
- Hispanic or Latino, of any race
- 6%
- White, not Hispanic
- 79%
- Black, not Hispanic
- 9%
- Asian, not Hispanic
- 1%
Income and housing
- Median household income
- $64,000
- Below the poverty line
- 14%
- Bachelor's or higher, adults 25+
- 21%
- Owner-occupied homes
- 71%
- Median home value
- $135,000
2024 vote for president
- Donald Trump, Republican
- 58.8%
- Kamala Harris, Democrat
- 39.4%
- Other candidates
- 1.8%
Votes counted, by precinct. Source: MIT Election Data and Science Lab, precinct returns (public domain).
Represent all of Stephenson County
Stephenson County's districts
U.S. House District 16
Part of Stephenson County: 11,502 people in 2020
Held by Darin LaHood, Republican
- Washington office: (202) 225-6201
About 748,900 people, median household income $84,400.
Largest towns: Bloomington (part), Pekin (part), Peoria (part) and 210 more
U.S. House District 17
Part of Stephenson County: 33,128 people in 2020
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 Stephenson 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
Part of Stephenson County: 10,879 people in 2020
Held by Tony McCombie, Republican
- Springfield office: (217) 782-3992
- District office: (815) 291-8989
Illinois House District 90
Part of Stephenson County: 33,751 people in 2020
Held by John Cabello, Republican
- Springfield office: (217) 782-8186
- District office: (815) 974-0090
About 108,100 people, median household income $76,700.
Largest towns: Freeport, Machesney Park (part), Roscoe and 17 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.
- Freeport23,973
- Lena2,772
- Lake Summerset (part)1,214
- Willow Lake1,026
- Pearl City790
- Orangeville766
- Cedarville663
- Davis589
- Dakota500
- German Valley433
- Rock City293
- Winslow281
- Ridott124
- Baileyville (part)19
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.