Washington was established in spring 1860, and in the same year was named the county seat. Landmarks include Washington County, Washington County Courthouse and Hollenberg Pony Express Station.
- CountyWashington County
- Population1,071 (2020 U.S. Census)
- Historic places5 on the National Register








































Washington County Courthouse
Washington County
Hollenberg Pony Express Station
Washington County Jail and Sheriff's Residence