15 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Point Pleasant | 1 | 3,843 | 4,068 | -1.11% | 1,591 | 2 | City |
| Point Pleasant | 2 | 3,843 | 4,056 | -1.11% | 1,591 | 2 | City |
| New Haven | 3 | 1,400 | 1,472 | -0.99% | 1,272 | 1 | Town |
| New Haven | 4 | 1,400 | 1,467 | -0.99% | 1,272 | 1 | Town |
| Mason | 5 | 828 | 859 | -0.72% | 1,420 | 1 | Town |
| Mason | 6 | 828 | 857 | -0.72% | 1,420 | 1 | Town |
| Clifton | 7 | 622 | 386 | 7.06% | 2,430 | 0 | CDP |
| Gallipolis Ferry | 8 | 500 | 559 | -4.03% | 220 | 2 | CDP |
| Hartford City | 9 | 497 | 506 | -0.4% | 402 | 1 | Town |
| Hartford City | 10 | 497 | 507 | -0.4% | 402 | 1 | Town |
| Henderson | 11 | 220 | 229 | -0.9% | 526 | 0 | Town |
| Henderson | 12 | 220 | 228 | -0.9% | 526 | 0 | Town |
| Apple Grove | 13 | 143 | 151 | -2.72% | 62 | 2 | CDP |
| Leon | 14 | 128 | 136 | -1.54% | 400 | 0 | Town |
| Leon | 15 | 128 | 136 | -1.54% | 400 | 0 | Town |
Point Pleasant is the largest city in Mason County, with a population of 3,843.
Leon is the smallest city in Mason County, with a population of 128.
There are 15 cities in Mason County, West Virginia.