Demographics & People — Lake Petersburg, Illinois
Population Overview
| Population (Census) | 769 |
|---|
| Estimated 2026 | ~1,400 |
|---|
| Median Age | 60.8 |
|---|
| Total Households | 346 |
|---|
| Family Households | 277 |
|---|
| Average Household Size | 2.22 |
|---|
| Diversity Index | 0.123 (relatively homogeneous) |
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Race & Ethnicity
| White | 709 |
|---|
| Black or African American | 0 |
|---|
| Asian | 25 |
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| Hispanic or Latino | 24 |
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Heritage & Ancestry
| Group | Count |
|---|
| German | 182 |
| English | 160 |
| Unclassified or not reported | 111 |
| Irish | 104 |
| Italian | 87 |
| Other groups | 66 |
| American | 59 |
| French (except Basque) | 35 |
| Scotch-Irish | 28 |
| Hispanic: Hispanic or Latino | 24 |
Language
| English Only | 680 |
|---|
| Spanish | 0 |
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| Population 5+ | 741 |
|---|
Veterans
| Veterans | 166 |
|---|
| Population 18+ | 661 |
|---|
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Lake Petersburg, Illinois.
