Walla Walla is the largest city in and the county seat of Walla Walla County, Washington, United States. The population was 31,731 at the 2010 census. Walla Walla is in the southeastern region of Washington, approximately four hours by car from Seattle, Washington and thirteen miles from the Oregon border. Whitman College, Walla Walla Community College, and the Washington State Penitentiary are located in Walla Walla. Walla Walla University is located in nearby College Place, Washington. In addition, Baker Boyer Bank, the oldest bank in the state of Washington, was founded in Walla Walla in 1869. Walla Walla is famous for its sweet onions. Many wineries are located in the area and it is a popular vacation spot for wine enthusiasts.
Transportation to Walla Walla includes service by air through Walla Walla Regional Airport and highway access primarily from U.S. Route 12. Washington State Department of Transportation is now engaged in a long-term process of widening this road into a four-lane divided highway between Pasco and Walla Walla. The city is also served by Valley Transit and the Grape Line service to Pasco.