Washington County is a county located in the eastern portion of the U.S. state of Missouri. As of the 2010 census, the population was 25,195. The largest city and county seat is Potosi. The county was officially organized on August 21, 1813, and was named in honor of George Washington, the first President of the United States.
The following maps are available for Washington County:
County Seat: Potosi
Populations (2010 Census)