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Potosi, MO

View of Potosi, MO
Image credit: TCP04 / CC BY 4.0
Population
2,568
U.S. Census Population Estimates Program · 2025
Elevation
901 ft
Median Home Value
$110,100
U.S. Census American Community Survey 5-Year · 2024
Median Rent
$788/mo
U.S. Census American Community Survey 5-Year · 2024
Median Income
$39,846
U.S. Census American Community Survey 5-Year · 2024

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Potosi in context.

OverallBest places in MissouriPopulation rankingHighest population places in MissouriNearest larger communityFarmington, Missouri22 miles away · 19,226 residents.

About Potosi

Potosi is Washington County’s seat in Missouri’s Lead Belt, southwest of St. Louis. French settler Francis Azor—known as “The Breton”—started the Mine au Breton settlement around lead deposits in 1763. Moses Austin arrived in 1797, secured a Spanish land grant, and expanded mining and smelting into a regional industry. A new county-seat town called Potosi formed across the creek in 1814; Mine au Breton and Potosi joined under one name in 1826. The old Presbyterian church and Austin cemetery remain part of the city’s historic core. Potosi is a Missouri county seat with mining at its foundation.

Top Rating Signals

Highest current ratings for this town.

Lower County Wildfire Hazard Potential ClassA+100.0ratingLower Projected Late-Century County-Area Exposure to Sea-Level RiseA+100.0ratingLow PopulationA+99.0rating

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