Sekiu River

The Sekiu River is a 12.5 mi long river in the U.S. state of Washington. The mouth of the river empties into Puget Sound from the Olympic Peninsula in Clallam County. The river has an additional 36.7 mi of tributaries connected to it. The nearest town is the census-designated place (CDP) of Sekiu approximately 4.75 mi east from the mouth of the Sekiu river.

The mouth of the Sekiu river is used to define the western border of North Puget Sound.