St. Mary's County ZIP Codes
Maryland, United States · 29 codes
St. Mary's County in Maryland has 29 ZIP codes, from 20606 to 20692, serving 29 places.
ZIP codes in St. Mary's
| ZIP Code | Places |
|---|---|
| 20606 | Abell |
| 20609 | Avenue |
| 20618 | Bushwood |
| 20619 | California |
| 20620 | Callaway |
| 20621 | Chaptico |
| 20622 | Charlotte Hall |
| 20624 | Clements |
| 20626 | Coltons Point |
| 20627 | Compton |
| 20628 | Dameron |
| 20630 | Drayden |
| 20634 | Great Mills |
| 20635 | Helen |
| 20636 | Hollywood |
| 20650 | Leonardtown |
| 20653 | Lexington Park |
| 20656 | Loveville |
| 20659 | Mechanicsville |
| 20660 | Morganza |
| 20667 | Park Hall |
| 20670 | Patuxent River |
| 20674 | Piney Point |
| 20680 | Ridge |
| 20684 | Saint Inigoes |
| 20686 | Saint Marys City |
| 20687 | Scotland |
| 20690 | Tall Timbers |
| 20692 | Valley Lee |
Frequently asked questions
What is the ZIP code of St. Mary's?
St. Mary's has 29 ZIP codes, from 20606 to 20692. The table lists the places each one serves.
How many places are listed in St. Mary's County?
29 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.