12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mountain Lake Park | 1 | 2,098 | 2,145 | -0.43% | 1,096 | 1.92 | Town |
| Oakland | 2 | 1,800 | 1,849 | -0.55% | 664 | 2.71 | Town |
| Grantsville | 3 | 949 | 971 | -0.42% | 915 | 1.04 | Town |
| Loch Lynn Heights | 4 | 481 | 491 | -0.41% | 1,513 | 0.32 | Town |
| Friendsville | 5 | 424 | 434 | -0.47% | 424 | 1 | Town |
| Accident | 6 | 326 | 335 | -0.61% | 660 | 0.49 | Town |
| Deer Park | 7 | 299 | 306 | -0.33% | 299 | 1 | Town |
| Gorman | 8 | 296 | 195 | 4.59% | 236 | 1.25 | CDP |
| Hutton | 9 | 292 | 65 | 6.96% | 1,780 | 0.16 | CDP |
| Kitzmiller | 10 | 289 | 298 | -0.69% | 1,302 | 0.22 | Town |
| Crellin | 11 | 176 | 57 | -3.3% | 251 | 0.70 | CDP |
| Bloomington | 12 | 90 | 152 | -13.46% | 145 | 0.62 | CDP |
Mountain Lake Park is the largest city in Garrett County, with a population of 2,098.
Bloomington is the smallest city in Garrett County, with a population of 90.
There are 12 cities in Garrett County, Maryland.