| Place Name | Saint Marys |
| Place Type | Unincorporated |
| ZIP Code(s) | 50229 |
| County | Warren County |
| Area Code(s) | 641 |
| Timezone | Central Standard Time (CST) |
| Population () | |
| Metro/Micro Stats Area | Des Moines-West Des Moines, IA |
| US Congressional District(s) | Iowa 1st |
| State House Districts | 22 |
| State Senate Districts | 11 |