The Salmon River flows from the Central Oregon Coast Range to the Pacific Ocean coast of northwest Oregon in the United States.

[1] About 24 miles (39 km) long,[4] it begins and ends in Lincoln County but also flows briefly through western Polk and southern Tillamook counties.

It continues generally west-southwestward through the Siuslaw National Forest, turning west again to enter the Pacific near Cascade Head, about 4 miles (6 km) north of Lincoln City.

The river and highway pass through the Van Duzer Forest Corridor State Wayside.

[7] The river supports populations of wild steelhead and coastal cutthroat trout, as well as chinook and coho salmon released each year from a hatchery at Otis.