| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Morgantown | 1 | 30,359 | 30,063 | 0.22% | 2,983 | 10 | City |
| Westover | 2 | 4,110 | 3,972 | 0.59% | 1,350 | 3 | City |
| Star City | 3 | 1,801 | 1,770 | 0.33% | 3,683 | 0 | Town |
| Granville | 4 | 1,366 | 1,344 | 0.29% | 1,053 | 1 | Town |
| Blacksville | 5 | 119 | 119 | 0% | 398 | 0 | Town |
Morgantown is the largest city in Monongalia County, with a population of 30,359.
Blacksville is the smallest city in Monongalia County, with a population of 119.
There are 5 cities in Monongalia County, West Virginia.