| Place Name | Saint Louis |
| Place Type | Unincorporated |
| ZIP Code(s) | 48880 |
| County | Gratiot County |
| Area Code(s) | 989 |
| Timezone | Eastern Daylight Time (EDT) |
| Population () | |
| Metro/Micro Stats Area | Alma, MI |
| US Congressional District(s) | Michigan 2nd |
| State House Districts | 92 |
| State Senate Districts | 34 |