Cedonia (pronounced sĕh-dōn-ya) is a small unincorporated community in Stevens County, Washington, United States.

[1] Formerly a town,[2] it lies in the valley of the Columbia River, on the western slope of hills known as Summit Mines,[3] at a river section known as Lake Roosevelt, a reservoir created by Grand Coulee Dam.

The area surrounding it is primarily a farming and ranching community with some logging activity.

Cedonia includes the Ye Olde Country Store, a veterinary clinic, and several homes.

[2] Education services are provided by Columbia High School in Hunters, Washington, about three miles due south of Cedonia.