7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Alderson | 1 | 924 | 973 | -0.96% | 1,034 | 1 | Town |
| Alderson | 2 | 924 | 969 | -0.96% | 1,034 | 1 | Town |
| Peterstown | 3 | 453 | 448 | 0.22% | 1,434 | 0 | Town |
| Peterstown | 4 | 453 | 448 | 0.22% | 1,434 | 0 | Town |
| Union | 5 | 416 | 421 | -0.24% | 931 | 0 | Town |
| Union | 6 | 416 | 421 | -0.24% | 931 | 0 | Town |
| Greenville | 7 | 290 | 305 | 7.01% | 2,014 | 0 | CDP |
Alderson is the largest city in Monroe County, with a population of 924.
Greenville is the smallest city in Monroe County, with a population of 290.
There are 7 cities in Monroe County, West Virginia.