
Potosi
- County:
- Washington County
- County Seat:
- Yes
- Area (mi²):
- 2.328
- State:
- Missouri
Potosi is a city located in Washington County, Missouri. Potosi has a 2025 population of 2,538. It is also the county seat of .Potosi is currently declining at a rate of -0.04% annually and its population has decreased by -0.2% since the most recent census, which recorded a population of 2,543 in 2020.
The average household income in Potosi is $46,120 with a poverty rate of 24.64%. The median age in Potosi is 35.6 years: 34 years for males, and 41.1 years for females.