Potosi is a city in Washington County, Missouri, United States. Potosi is seventy-two miles southwest of St. Louis. The population was 2,660 as of the 2010 census. It is the county seat of Washington County.
Washington County Courthouse
Tomb of Moses Austin and Maria Brown Austin in Potosi behind the Presbyterian church built in 1832
A view of Potosi published in 1819 by H.R. Schoolcraft, captioned Potosi, alias Mine á Burton
Washington County, Missouri
Washington County is located in the southeastern part of the U.S. state of Missouri. As of the 2020 United States census, the population was 23,514. The county seat and largest city 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 Washington County Courthouse in Potosi