Blalock was an unincorporated community located in the Columbia River Gorge in Gilliam County, Oregon, United States. The town displaced a Native American settlement originally named Táwash. Blalock was located about 7 miles (11 km) west of Arlington on Interstate 84/U.S. Route 30 at the mouth of Blalock Canyon. Blalock is still the name of a station on the Union Pacific Railroad (originally the Oregon Railway and Navigation Company, or OR&N).