11 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 21550 | Oakland | 13,691 |
| 21536 | Grantsville | 3,833 |
| 21562 | Westernport | 3,032 |
| 21531 | Friendsville | 2,487 |
| 21561 | Swanton | 2,412 |
| 21539 | Lonaconing | 1,975 |
| 21520 | Accident | 1,918 |
| 21521 | Barton | 1,400 |
| 21541 | McHenry | 1,335 |
| 21538 | Kitzmiller | 678 |
| 21523 | Bloomington | 150 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 11 ZCTAs in Garrett County, Maryland (US Census).