| Place Name | Petersburg |
| Place Type | City |
| ZIP Code(s) | 49270 |
| County | Monroe County |
| Area Code(s) | 734 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 1,210 |
| Population Growth Rate (2010-19) | 2.18% |
| Majority Ethnicity | White 95.34% |
| Metro/Micro Stats Area | Monroe, MI |
| US Congressional District(s) | Michigan 7th |
| State House Districts | 56 |
| State Senate Districts | 17 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.34% |
| African American | 1.16% |
| Hispanic | 0.17% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.33% |