27 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Welch | 1 | 3,364 | 3,629 | -1.44% | 557 | 6 | City |
| Welch | 2 | 3,364 | 3,609 | -1.44% | 557 | 6 | City |
| Gilbert Creek | 3 | 734 | 1,019 | -3.17% | 63 | 12 | CDP |
| Raysal | 4 | 689 | 405 | 2.23% | 561 | 1 | CDP |
| Gary | 5 | 667 | 772 | -2.91% | 793 | 1 | City |
| Gary | 6 | 667 | 765 | -2.91% | 793 | 1 | City |
| War | 7 | 528 | 622 | -3.3% | 593 | 1 | City |
| War | 8 | 528 | 615 | -3.3% | 593 | 1 | City |
| Crumpler | 9 | 448 | 224 | 3.7% | 299 | 2 | CDP |
| Kimball | 10 | 240 | 283 | -3.23% | 397 | 1 | Town |
| Kimball | 11 | 240 | 280 | -3.23% | 397 | 1 | Town |
| Iaeger | 12 | 235 | 276 | -3.29% | 297 | 1 | Town |
| Iaeger | 13 | 235 | 273 | -3.29% | 297 | 1 | Town |
| Northfork | 14 | 198 | 232 | -3.41% | 205 | 1 | Town |
| Northfork | 15 | 198 | 230 | -3.41% | 205 | 1 | Town |
| Berwind | 16 | 180 | 221 | -3.74% | 623 | 0 | CDP |
| Davy | 17 | 179 | 208 | -3.24% | 141 | 1 | Town |
| Davy | 18 | 179 | 206 | -3.24% | 141 | 1 | Town |
| Bradshaw | 19 | 176 | 205 | -3.3% | 227 | 1 | Town |
| Bradshaw | 20 | 176 | 203 | -3.3% | 227 | 1 | Town |
| Keystone | 21 | 148 | 175 | -3.27% | 457 | 0 | City |
| Keystone | 22 | 148 | 173 | -3.27% | 457 | 0 | City |
| Maybeury | 23 | 145 | 72 | -3.97% | 87 | 2 | CDP |
| Anawalt | 24 | 143 | 167 | -3.38% | 249 | 1 | Town |
| Anawalt | 25 | 143 | 165 | -3.38% | 249 | 1 | Town |
| Roderfield | 26 | 112 | 111 | -4.27% | 423 | 0 | CDP |
| Cucumber | 27 | 62 | 23 | 6.9% | 137 | 0 | CDP |
Welch is the largest city in McDowell County, with a population of 3,364.
Cucumber is the smallest city in McDowell County, with a population of 62.
There are 27 cities in McDowell County, West Virginia.