| Place Name | Petersburg |
| Place Type | City |
| ZIP Code(s) | 62675 |
| County | Menard County |
| Area Code(s) | 217 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 2,234 |
| Population Growth Rate (2010-19) | -0.09% |
| Majority Ethnicity | White 97.51% |
| Metro/Micro Stats Area | Springfield, IL |
| US Congressional District(s) | Illinois 18th |
| State House Districts | 87 |
| State Senate Districts | 44 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.51% |
| African American | 0.53% |
| Hispanic | 0% |
| Asian | 0.33% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.63% |