| Place Name | St. Clair |
| Place Type | City |
| ZIP Code(s) | 56001 56080 |
| County | Blue Earth County |
| Area Code(s) | 507 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 667 |
| Population Growth Rate (2010-19) | -13.59% |
| Majority Ethnicity | White 91.58% |
| Metro/Micro Stats Area | Mankato, MN |
| US Congressional District(s) | Minnesota 1st |
| State House Districts | 23B |
| State Senate Districts | 23 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 91.58% |
| African American | 3.37% |
| Hispanic | 0% |
| Asian | 0.78% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.27% |