The Touchet River /ˈtuːʃi/ is a 65-mile (105 km) tributary of the Walla Walla River in southeastern Washington in the United States. The Touchet River drains an area of about 752 square miles (1,950 km2) in Columbia County and Walla Walla County.
The Touchet River is formed by several forks draining the north slope of the Blue Mountains above Dayton in Columbia County.
The Touchet is known for its rainbow and cutthroat trout fishing, especially in the upper and middle reaches.