Wikipedia contributors. (2026, February 23). Dayton, Washington. In Wikipedia, The Free Encyclopedia. Retrieved 20:25, June 13, 2026, from https://en.wikipedia.org/w/index.php?title=Dayton,_Washington&oldid=1340005882
Dayton, Washington (Wikipedia) Dayton is a city in and the county seat of Columbia County, Washington, United States. The population was 2,448 at the 2020 census.