|Etymology||Native American (Indian) name for the creek, according to 19th-century surveyor, Robert S. Williamson|
|County||Deschutes and Jefferson|
|Source||Broken Top, Cascade Range|
|⁃ location||Deschutes National Forest, Deschutes County|
|⁃ elevation||7,617 ft (2,322 m)|
|Crooked River National Grassland, Jefferson County|
|2,110 ft (640 m)|
|Basin size||253 sq mi (660 km2)|
|Designated||October 28, 1988|
Whychus Creek is a tributary of the Deschutes River in Deschutes and Jefferson counties in the U.S. state of Oregon. Formerly named Squaw Creek, considered derogatory in the 21st century, it was renamed in 2006. Explorer John C. Frémont camped along the stream in 1843 but did not identify it by name. Robert S. Williamson, a surveyor who camped there in 1855, said its Indian (Native American) name was Why-chus.
Whychus Creek begins about 7,600 feet (2,300 m) above sea level at the base of Bend Glacier on Broken Top in the Cascade Range. Flowing generally north through the Three Sisters Wilderness, the stream plunges over 200-foot (61 m) Upper Chush Falls before receiving Park Creek from the left and plunging over 50-foot (15 m) Chush Falls. Downstream of the waterfalls, the creek receives South Fork and North Fork from the left and Snow Creek from the right.
Turning northeast, the creek intersects Whychus Creek Canal, which diverts water to McKenzie Canyon Reservoir and other parts of the Three Sisters Irrigation District. Flowing by the southeast side of the city of Sisters, Whychus Creek passes under U.S. Route 20 and Oregon Route 126, which overlap in this vicinity, before receiving Indian Ford Creek from the left. Continuing northeast, the creek leaves Deschutes County and enters Jefferson County and the Crooked River National Grassland. The creek empties into the Deschutes River downstream of the city of Redmond and about 123 miles (198 km) from the larger stream's confluence with the Columbia River.
- "Whychus Creek". Geographic Names Information System (GNIS). United States Geological Survey. November 28, 1980. Retrieved May 1, 2012.
- McArthur, Lewis A.; Lewis L. McArthur (2003) . Oregon Geographic Names (7th ed.). Portland, Oregon: Oregon Historical Society Press. p. 907. ISBN 0-87595-277-1.
- Source elevation derived from Google Earth search using GNIS source coordinates.
- Upper Deschutes Watershed Council (2009). "Whychus Creek Restoration Monitoring Plan" (PDF). Upper Deschutes Watershed Council. p. 1. Retrieved May 1, 2012.
- "Whychus Creek". Geographic Names Information System. United States Geological Survey. November 28, 1980. Retrieved August 4, 2011.
- "Sisters Country Timeline". Sisters Country Historical Society. 1996. Retrieved May 1, 2012.
- Oregon Atlas & Gazetteer. Freeport, Maine: DeLorme Mapping. 1991. p. 50. ISBN 0-89933-235-8.
- Anderson, David L. (2007). Waterfalls of the Pacific Northwest. Woodstock, Vermont: The Countryman Press. pp. 183–85. ISBN 978-0-88150-713-3.
- "Who We Are". Three Rivers Irrigation District. Retrieved May 1, 2012.
- United States Geological Survey (USGS). "United States Geological Survey Topographic Map". TopoQuest. Retrieved May 1, 2012. The map quadrangles include river mile (RM) markers along the Deschutes River.