The Wynoochee River is a 60-mile (97 km) long river located in the Olympic Peninsula in the U.S. state of Washington. A tributary of the Chehalis River, the Wynoochee River rises in the Olympic Mountains within the Olympic National Park and flows generally south. Its drainage basin is 218 square miles (560 km2) in area. The name Wynoochee comes from the Lower Chehalis placename /xʷənúɬč/, meaning "shifting".
- "Wynoochee River". The Columbia Gazetteer of North America. Retrieved 2009-05-19.
- "Chehalis River Basin Nonpoint Action Plan - Wynoochee River". Chehalis River Council. Retrieved 2009-06-05.
- Bright, William (2004). Native American placenames of the United States. University of Oklahoma Press. p. 576. ISBN 978-0-8061-3598-4. Retrieved 6 April 2011.
- Majors, Harry M. (1975). Exploring Washington. Van Winkle Publishing Co. p. 73. ISBN 978-0-918664-00-6.