Walla Walla is both the county seat of Walla Walla County, Washington, and the county's largest city. As of the 2000 census, the city population was 29,686. Walla Walla is in the southeastern region of Washington, approximately five hours by car from Seattle, Washington and thirteen miles from the Oregon border. Walla Walla apartments for rent comparison page shows most up to date rent information on Walla Walla apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.