Clarkston is a city in Asotin County, Washington, United States. It is part of the Lewiston, ID-WA metropolitan area, and is located west of Lewiston, Idaho, across the Snake River.
The population of Clarkston was 7,229 in 2010 census.
Walla Walla Community College opened a branch campus in Clarkston that serves the surrounding area.
With a ZIP code of 99403, Clarkston has the highest zip code of any area in the contiguous United States.