Chelan County, WashingtonGrant County, WashingtonKittitas County, WashingtonOkanogan County, Washington- Douglas County — Thumbnail History (historylink.org)
Douglas County is a predominantly rural county located in north central Washington. Waterville is the county seat. The county’s proximity to Grand Coulee Dam just over the county line (spanning the Columbia River between Okanogan and Grant counties), as well as the four Columbia River dams within the county have over time provided work for thousands of Douglas County residents.
- Douglas County, Washington (Wikipedia)
Douglas County is a county located in the U.S. state of Washington. As of the 2020 census, its population was 42,938. The county seat is Waterville, while its largest settlement is East Wenatchee. The county was created out of Lincoln County on November 28, 1883 and is named for American statesman Stephen A. Douglas.