Waitsburg is a city in Walla Walla County, Washington, United States. The population was 1,166 at the 2020 census. Waitsburg has a unique city classification in Washington state, being the state's only city which still operates under its territorial charter.

Walla Walla County is a county located in the U.S. state of Washington. As of the 2020 census, its population was 62,584. The county seat and largest city is Walla Walla. The county was formed on April 25, 1854 and is named after the Walla Walla tribe of Native Americans.