1 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cathlamet | 1 | 630 | 563 | 1.78% | 1,245 | 1 | Town |
Cathlamet is the largest city in Wahkiakum County, with a population of 630.
Cathlamet is the smallest city in Wahkiakum County, with a population of 630.
There is 1 city in Wahkiakum County, Washington.