Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Puget Island | 1 | 1,095 | 1,227 | 1.77% | 145 | 7.6 | CDP |
| East Cathlamet | 2 | 642 | 512 | 1.74% | 375 | 1.7 | CDP |
| Cathlamet | 3 | 605 | 561 | 1.85% | 1,196 | 0.5 | Town |
| Lower Elochoman | 4 | 488 | 475 | 4.5% | 323 | 1.5 | CDP |
| Rosburg | 5 | 448 | 320 | 2.28% | 20 | 22.9 | CDP |
| Skamokawa Valley | 6 | 269 | 268 | -3.58% | 10 | 28.2 | CDP |
| Grays River | 7 | 256 | 309 | 0% | 13 | 20.2 | CDP |
| Upper Elochoman | 8 | 93 | 119 | -7% | 64 | 1.4 | CDP |
| Altoona | 9 | 62 | 35 | 8.77% | 12 | 5.1 | CDP |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Puget Island is the largest city in Wahkiakum County.
Altoona is the smallest city in Wahkiakum County.
There are 9 cities in Wahkiakum County, Washington.