Unincorporated community in Menard County, Illinois
Lake Petersburg
Who lives in Lake Petersburg
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 928
- Median age
- 60.8 years
- Under 18
- 10%
- 65 and over
- 38%
- Veterans, of adults
- 20%
- Speak another language at home
- 1%
Race and ethnicity
- Hispanic or Latino, of any race
- 0%
- White, not Hispanic
- 100%
- Black, not Hispanic
- 0%
- Asian, not Hispanic
- 0%
Income and housing
- Median household income
- $144,400
- Below the poverty line
- 3%
- Bachelor's or higher, adults 25+
- 48%
- Owner-occupied homes
- 97%
- Median home value
- $339,000
2024 vote for president
Not counted for Lake Petersburg on its own: its precincts follow township lines, not the town’s. See the figure for Menard County.
Who represents Lake Petersburg
Lake Petersburg's districts
U.S. House District 15
All of Lake Petersburg
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 Lake Petersburg
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 108
All of Lake Petersburg
Held by Wayne Rosenthal, Republican
- Springfield office: (217) 782-8071
- District office: (217) 782-8071
About 107,100 people, median household income $80,400.
Largest towns: Litchfield, Hillsboro, Carlinville and 53 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.