Skamokawa Valley is a census-designated place (CDP) in Wahkiakum County, Washington, north of the town of Cathlamet.

The name of the CDP comes from Wahkiakum Chief Skamokawa who met with Meriwether Lewis and William Clark while their expedition spent the winter of 1805–06 at Fort Clatsop.

[4] His name, Skamokawa, is a Chinook word meaning “smoke over the water,” a reference to the area's foggy climate.

[5] The ancestry of Skamokawa Valley was 29.7% German, 15.7% Irish, 9.6% Scottish, 9.2% English, 4.0% French, and 2.0% Norwegian.

30.2% of all households were made up of individuals, and 14.4% had someone living alone who was 65 years of age or older.