| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Clarksburg | 1 | 15,403 | 16,294 | -1.02% | 1,485 | 10 | City |
| Bridgeport | 2 | 9,462 | 9,236 | 0.37% | 893 | 11 | City |
| Pleasant Valley | 3 | 3,449 | 3,496 | -0.23% | 1,067 | 3 | City |
| Shinnston | 4 | 2,227 | 2,308 | -0.62% | 1,332 | 2 | City |
| Stonewood | 5 | 1,728 | 1,812 | -0.86% | 2,031 | 1 | City |
| Salem | 6 | 1,557 | 1,631 | -0.83% | 766 | 2 | City |
| Nutter Fort | 7 | 1,440 | 1,500 | -0.76% | 1,620 | 1 | Town |
| Monongah | 8 | 1,075 | 969 | 1.9% | 2,203 | 0 | Town |
| White Hall | 9 | 699 | 705 | -0.14% | 664 | 1 | Town |
| Lumberport | 10 | 642 | 675 | -0.93% | 1,279 | 1 | Town |
| Anmoore | 11 | 478 | 501 | -0.83% | 451 | 1 | Town |
| West Milford | 12 | 440 | 457 | -0.68% | 829 | 1 | Town |
| Lost Creek | 13 | 359 | 378 | -1.1% | 297 | 1 | Town |
Clarksburg is the largest city in Harrison County, with a population of 15,403.
Lost Creek is the smallest city in Harrison County, with a population of 359.
There are 13 cities in Harrison County, West Virginia.