11 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 21550 | Oakland | 13,469 |
| 21536 | Grantsville | 3,829 |
| 21562 | Westernport | 3,192 |
| 21561 | Swanton | 2,662 |
| 21531 | Friendsville | 2,346 |
| 21520 | Accident | 2,327 |
| 21539 | Lonaconing | 1,846 |
| 21521 | Barton | 1,521 |
| 21541 | McHenry | 1,147 |
| 21538 | Kitzmiller | 605 |
| 21523 | Bloomington | 165 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 11 ZCTAs in Garrett County, Maryland (US Census).