5 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Moundsville | 1 | 7,521 | 8,067 | -1.2% | 2,587 | 3 | City |
| McMechen | 2 | 1,562 | 1,687 | -1.33% | 2,736 | 1 | City |
| Glen Dale | 3 | 1,380 | 1,479 | -1.15% | 1,624 | 1 | City |
| Benwood | 4 | 1,172 | 1,268 | -1.35% | 903 | 1 | City |
| Cameron | 5 | 797 | 859 | -1.24% | 928 | 1 | City |
Moundsville is the largest city in Marshall County, with a population of 7,521.
Cameron is the smallest city in Marshall County, with a population of 797.
There are 5 cities in Marshall County, West Virginia.