8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Williamson | 1 | 2,675 | 3,064 | -2.83% | 817 | 3.27 | City |
| Chattaroy | 2 | 612 | 585 | -1.61% | 300 | 2.04 | CDP |
| Red Jacket | 3 | 495 | 255 | -1% | 94 | 5.27 | CDP |
| Delbarton | 4 | 379 | 418 | -2.07% | 191 | 1.99 | Town |
| Matewan | 5 | 361 | 411 | -2.7% | 653 | 0.55 | Town |
| Gilbert | 6 | 297 | 331 | -2.3% | 298 | 0.99 | Town |
| Justice | 7 | 296 | 584 | -2.63% | 224 | 1.32 | CDP |
| Kermit | 8 | 280 | 314 | -2.44% | 714 | 0.39 | Town |
Williamson is the largest city in Mingo County, with a population of 2,675.
Kermit is the smallest city in Mingo County.
There are 8 cities in Mingo County, West Virginia.