13 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Clarksburg | 1 | 14,936 | 15,913 | -1.08% | 1,440 | 10 | City |
| Bridgeport | 2 | 9,477 | 9,236 | 0.42% | 894 | 11 | City |
| Pleasant Valley | 3 | 3,454 | 3,502 | -0.23% | 1,069 | 3 | City |
| Shinnston | 4 | 2,231 | 2,311 | -0.58% | 1,334 | 2 | City |
| Stonewood | 5 | 1,719 | 1,805 | -0.81% | 2,020 | 1 | City |
| Salem | 6 | 1,449 | 1,524 | -0.82% | 713 | 2 | City |
| Nutter Fort | 7 | 1,430 | 1,489 | -0.69% | 1,609 | 1 | Town |
| Monongah | 8 | 1,086 | 966 | 1.88% | 2,225 | 0 | Town |
| White Hall | 9 | 703 | 706 | 0% | 668 | 1 | Town |
| Lumberport | 10 | 679 | 717 | -0.88% | 1,353 | 1 | Town |
| Anmoore | 11 | 496 | 517 | -0.6% | 468 | 1 | Town |
| West Milford | 12 | 448 | 466 | -0.67% | 844 | 1 | Town |
| Lost Creek | 13 | 336 | 354 | -0.88% | 278 | 1 | Town |
Clarksburg is the largest city in Harrison County, with a population of 14,936.
Lost Creek is the smallest city in Harrison County, with a population of 336.
There are 13 cities in Harrison County, West Virginia.