| Place Name | Saint Leonard |
| Place Type | Unincorporated |
| ZIP Code(s) | 20685 |
| County | Calvert County |
| Area Code(s) | 410,443,667 |
| Timezone | Eastern Daylight Time (EDT) |
| Population () | |
| Metro/Micro Stats Area | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| US Congressional District(s) | Maryland 5th |
| House of Delegates Districts | 27C |
| State Senate Districts | 27 |