13 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Clarksburg | 1 | 15,135 | 16,019 | -1.16% | 1,557 | 9.72 | City |
| Bridgeport | 2 | 9,414 | 9,321 | 0.2% | 888 | 10.60 | City |
| Pleasant Valley | 3 | 3,468 | 3,505 | -0.2% | 1,073 | 3.23 | City |
| Shinnston | 4 | 2,244 | 2,323 | -0.71% | 1,342 | 1.67 | City |
| Stonewood | 5 | 1,728 | 1,805 | -0.86% | 2,031 | 0.85 | City |
| Salem | 6 | 1,455 | 1,522 | -0.89% | 1,087 | 1.34 | City |
| Nutter Fort | 7 | 1,429 | 1,491 | -0.83% | 1,607 | 0.89 | Town |
| Monongah | 8 | 1,084 | 971 | 2.17% | 2,221 | 0.49 | Town |
| White Hall | 9 | 702 | 704 | 0% | 667 | 1.05 | Town |
| Lumberport | 10 | 681 | 715 | -1.02% | 1,354 | 0.50 | Town |
| Anmoore | 11 | 493 | 513 | -0.8% | 466 | 1.06 | Town |
| West Milford | 12 | 435 | 452 | -0.69% | 819 | 0.53 | Town |
| Lost Creek | 13 | 340 | 359 | -1.16% | 350 | 0.97 | Town |
Clarksburg is the largest city in Harrison County, with a population of 15,135.
Lost Creek is the smallest city in Harrison County.
There are 13 cities in Harrison County, West Virginia.