5 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Moundsville | 1 | 7,612 | 8,067 | -1.18% | 2,619 | 3 | City |
| McMechen | 2 | 1,583 | 1,687 | -1.31% | 2,772 | 1 | City |
| Glen Dale | 3 | 1,396 | 1,479 | -1.2% | 1,642 | 1 | City |
| Benwood | 4 | 1,188 | 1,268 | -1.33% | 915 | 1 | City |
| Cameron | 5 | 807 | 859 | -1.34% | 939 | 1 | City |
Moundsville is the largest city in Marshall County, with a population of 7,612.
Cameron is the smallest city in Marshall County, with a population of 807.
There are 5 cities in Marshall County, West Virginia.