| Post Office | Lexington Park |
| Division | Saint Marys |
| Pincode | 20653 |
| Post Office | Mechanicsville |
| Division | Saint Marys |
| Pincode | 20659 |
| Post Office | Leonardtown |
| Division | Saint Marys |
| Pincode | 20650 |
| Post Office | California |
| Division | Saint Marys |
| Pincode | 20619 |
| Post Office | Hollywood |
| Division | Saint Marys |
| Pincode | 20636 |
| Post Office | Great Mills |
| Division | Saint Marys |
| Pincode | 20634 |
| Post Office | Callaway |
| Division | Saint Marys |
| Pincode | 20620 |
| Post Office | Saint Marys City |
| Division | Saint Marys |
| Pincode | 20686 |
| Post Office | Patuxent River |
| Division | Saint Marys |
| Pincode | 20670 |
28 City in Saint Marys | List of Zip Codes Location In Maryland and Your selected County Saint Marys