County in Illinois
Whiteside County
About 54,900 people, median household income $67,500.
District lines run through Whiteside County, so who represents you here depends on where you live. Search your address to see yours.
Who lives in Whiteside County
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 54,900
- Median age
- 43.0 years
- Under 18
- 22%
- 65 and over
- 22%
- Veterans, of adults
- 8%
- Speak another language at home
- 7%
Race and ethnicity
- Hispanic or Latino, of any race
- 13%
- White, not Hispanic
- 81%
- Black, not Hispanic
- 1%
- Asian, not Hispanic
- 1%
Income and housing
- Median household income
- $67,500
- Below the poverty line
- 12%
- Bachelor's or higher, adults 25+
- 21%
- Owner-occupied homes
- 77%
- Median home value
- $127,000
2024 vote for president
- Donald Trump, Republican
- 56.3%
- Kamala Harris, Democrat
- 41.6%
- Other candidates
- 2.0%
Votes counted, by precinct. Source: MIT Election Data and Science Lab, precinct returns (public domain).
Represent all of Whiteside County
Whiteside County's districts
U.S. House District 17
All of Whiteside County
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 37
All of Whiteside County
Held by Li Arellano, Republican
- Springfield office: (217) 782-1942
- District office: (779) 251-5003
Illinois House District 73
Part of Whiteside County: 20,114 people in 2020
Held by Ryan Spain, Republican
- Springfield office: (217) 782-8108
- District office: (309) 690-7373
Illinois House District 74
Part of Whiteside County: 35,577 people in 2020
Held by Brad Fritts, Republican
- Springfield office: (217) 782-0535
- District office: (815) 561-3690
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 (13)
Cities, villages and unincorporated communities, with the number of people in the county’s part of each at the 2020 Census.
- Sterling14,764
- Rock Falls8,789
- Morrison4,085
- Fulton3,647
- Prophetstown1,946
- Erie1,518
- Albany864
- Tampico689
- Lyndon537
- Como528
- Galt193
- Coleta167
- Deer Grove38
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.