5 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Williamson | 1 | 2,635 | 3,066 | -2.66% | 805 | 3 | City |
| Delbarton | 2 | 373 | 418 | -1.84% | 188 | 2 | Town |
| Matewan | 3 | 356 | 410 | -2.47% | 644 | 1 | Town |
| Gilbert | 4 | 290 | 328 | -2.03% | 291 | 1 | Town |
| Kermit | 5 | 275 | 316 | -2.48% | 702 | 0 | Town |
Williamson is the largest city in Mingo County, with a population of 2,635.
Kermit is the smallest city in Mingo County, with a population of 275.
There are 5 cities in Mingo County, West Virginia.