|Wasco County Oregon Cities/Towns - Antelope, Chenoweth, Dufur, Maupin, Mosier, The Dalles (County Seat)
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Wasco County is a county located in the U.S. state of Oregon. In 2000, its population was 23,791. Its county seat is The Dalles.
The county is named for a local tribe of Native Americans, the Wasco, a Chinook tribe who lived on the south side of the Columbia River.