| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Shelton | 1 | 10,999 | 10,434 | 0.71% | 1,701 | 6 | City |
Shelton is the largest city in Mason County, with a population of 10,999.
Shelton is the smallest city in Mason County, with a population of 10,999.
There is 1 city in Mason County, Washington.