|Grant County Washington Cities/Towns - Beverly, Coulee City, Desert Aire, Electric City, Ephrata (County Seat), George, Grand Coulee, Hartline, Krupp, Lakeview, Mattawa, Moses Lake, Moses Lake North, Quincy, Royal City, Soap Lake, Warden, Wilson Creek
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Grant County is a county located in the U.S. state of Washington. As of 2016, the population was 93,546. The county seat is at Ephrata.
It was named after U.S. President Ulysses S. Grant. Grant County was formed out of Douglas County on February 24, 1909.