Priest Rapids Dam is a hydroelectric, concrete gravity dam; located on the Columbia River, between the Yakima Firing Range and the Hanford Nuclear Reservation, and bridges Yakima County and Grant County, in the U.S. state of Washington.

After the disaster of 1949 Vanport Flood on the lower Columbia River, around Vancouver, Washington, and Portland, Oregon, the federal government established the Priest Rapids Project under the Flood Control Act of 1950 (Public Law 81-516; May 17, 1950).

Revenue bonds were issued for construction to begin in July 1956, first generation occurred in 1959, and the dam was completed in 1961.

Its reservoir is named Priest Rapids Lake, and extends 18 miles upstream to spillway of Wanapum Dam.

Downriver from Priest Rapids Dam is Hanford Reach, the only free-flowing, non-tidal stretch of the Columbia River in the United States.