CDP in Cass County, Illinois · 1.8 sq mi · 432 people per sq mi
About 780 people live in Lake Petersburg. The typical household earns $144,375, and the median resident is 60.8 years old.
2026 projection
From 547 in 2020
Poverty rate 2.69%
Men 62 · Women 59.5
2011–2026
781
2026 projection
42.8% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2011–2026
781
2026 projection
42.8% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 781 | +4 | 0.51% |
|---|---|---|---|
| 2025 | 777 | +8 | 0.52% |
| 2023 | 769 | +6 | 0.79% |
| 2022 | 763 | +98 | 14.74% |
| 2021 | 665 | +118 | 21.57% |
| 2020 | 547 | +98 | 21.83% |
| 2019 | 449 | -104 | 18.81% |
| 2018 | 553 | -21 | 3.66% |
| 2017 | 574 | -75 | 11.56% |
| 2016 | 649 | +21 | 3.34% |
Showing 10 of 15 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 9 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 37 residents
85% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 85% | 88% | 81% |
| Never married | 10% | 6% | 14% |
| Divorced | 2% | 4% | 0% |
| Widowed | 2% | 2% | 2% |
| Separated | 2% | 0% | 3% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau