Walla Walla is the largest city in and the
county seat of
Walla Walla County,
Washington,
United States, . former Catholic bishopric and present Latin
titular see. The population of the city itself was 31,731 at the
2010 census. The population of Walla Walla and its two suburbs, the town of College Place and unincorporated "East Walla Walla," is about 45,000. Walla Walla is in the southeastern region of Washington, approximately four and a half hours away by car from
Portland, Oregon, and
Seattle, Washington, and thirteen miles north of the
Oregon border.