Potosi, Missouri

Potosi, Missouri
Washington County Courthouse
Motto: 
A City for All Seasons
Location of Potosi, Missouri
Coordinates: 37°56′01″N 90°46′30″W / 37.93361°N 90.77500°W / 37.93361; -90.77500
CountryUnited States
StateMissouri
CountyWashington
Incorporated1826
Area
  Total
2.33 sq mi (6.03 km2)
  Land2.33 sq mi (6.03 km2)
  Water0.00 sq mi (0.00 km2)
Elevation
991 ft (302 m)
Population
 (2020)
  Total
2,538
  Density1,090.21/sq mi (420.86/km2)
Time zoneUTC−6 (Central (CST))
  Summer (DST)UTC−5 (CDT)
ZIP code
63664
Area code573
FIPS code29-59330
GNIS feature ID2396262

Potosi is a city and the county seat of Washington County, Missouri, United States. Potosi is 72 miles (116 km) southwest of St. Louis. The population was 2,538 as of the 2020 census.

Located in the Lead Belt, the city was founded in 1763 by French colonists as Mine à Breton or Mine au Breton. After the United States acquired this area, American Moses Austin renamed the community for the Bolivian silver-mining city of Potosí. He was involved in lead mining.