Walla Walla is the largest city and the county seat of Walla Walla County, Washington, United States.

The population of the city itself was 31,802 at the 2010 census. The population of Walla Walla and its two suburbs, the town of College Place and unincorporated East Walla Walla, is nearly 45,000. Walla Walla is in the southeastern region of Washington, approximately four hours away from Portland, Oregon, and four and half hours from Seattle, and only 6 mi (10 km) north of the Oregon border.

Recorded archives in this come clean begins gone the commencement of Fort Nez Perce in 1818 by the North West Company to trade subsequently the Walla Walla people and additional local Native American groups. At the time, the term “Nez Perce” was used more broadly than today, and included the Walla Walla in its scope in English usage. Fort Nez Perce had its name shift to Fort Walla Walla. It was located significantly west of the present city.

On September 1, 1836, Marcus Whitman arrived with his wife Narcissa Whitman. Here they acknowledged the Whitman Mission in an unsuccessful attempt to convert the local Walla Walla tribe to Christianity. Following a disorder epidemic, both were killed in 1847 by the Cayuse who believed that the missionaries were poisoning the original peoples. Whitman College was normal in their honor.

On July 24, 1846, Pope Pius IX traditional the Diocese of Walla Walla and appointed Augustin-Magloire Blanchet to become the first Bishop of Walla Walla. The diocese was short-lived as Bishop Blanchet fled to St. Paul, Oregon, after the Whitman Massacre. In 1850, the Diocese of Nesqually was expected in Vancouver and in 1853 the Diocese of Walla Walla was suppressed and absorbed into the Diocese of Nesqually. Today, the Diocese of Walla Walla is a titular see currently held by Witold Mroziewski, an accessory bishop of Brooklyn.