Potosi is a historical city in Washington County located approximately 72 miles Southwest of St. Louis. As of the 2021 Census, the population was 2526. It is the County Seat of Washington County.

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Potosi is a historical city in Washington County located approximately 72 miles Southwest of St. Louis. As of the 2021 Census, the population was 2526. It is the County Seat of Washington County.

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Potosi is a historical city in Washington County located approximately 72 miles Southwest of St. Louis. As of the 2021 Census, the population was 2526. It is the County Seat of Washington County.