Village in Stephenson County, Illinois
Rock City
Who lives in Rock City
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 441
- Median age
- 26.8 years
- Under 18
- 38%
- 65 and over
- 14%
- Veterans, of adults
- 3%
- Speak another language at home
- 4%
Race and ethnicity
- Hispanic or Latino, of any race
- 33%
- White, not Hispanic
- 64%
- Black, not Hispanic
- 0%
- Asian, not Hispanic
- 0%
Income and housing
- Median household income
- $68,100
- Below the poverty line
- 5%
- Bachelor's or higher, adults 25+
- 11%
- Owner-occupied homes
- 80%
- Median home value
- $123,000
2024 vote for president
Not counted for Rock City on its own: its precincts follow township lines, not the town’s. See the figure for Stephenson County.
Who represents Rock City
Rock City's districts
U.S. House District 16
All of Rock City
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
Illinois Senate District 45
All of Rock City
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 90
All of Rock City
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.
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.