Potosi is a city in Washington County, Missouri, United States. Potosi is seventy-two miles southwest of St. Louis. The population was 2,660 at the 2010 census. It is the county seat of Washington County. The city was founded sometime between 1760 and 1780 as “Mine à Breton” or Mine au Breton, and later renamed by Moses Austin for the Bolivian silver-mining city of Potosí.
According to the United States Census Bureau, the city has a total area of 2.33 square miles (6.03 km), all land.
As of the census of 2010, there were 2,660 people, 1,114 households, and 657 families residing in the city. The population density was 1,141.6 inhabitants per square mile (440.8/km). There were 1,230 housing units at an average density of 527.9 per square mile (203.8/km). The racial makeup of the city was 95.2% White, 2.2% African American, 0.4% Native American, 0.4% Asian, 0.3% from other races, and 1.6% from two or more races. Hispanic or Latino of any race were 1.6% of the population.
There were 1,114 households of which 32.2% had children under the age of 18 living with them, 37.0% were married couples living together, 17.8% had a female householder with no husband present, 4.2% had a male householder with no wife present, and 41.0% were non-families. 36.4% of all households were made up of individuals and 14.9% had someone living alone who was 65 years of age or older. The average household size was 2.23 and the average family size was 2.86.
The median age in the city was 39.1 years. 24.2% of residents were under the age of 18; 8.8% were between the ages of 18 and 24; 23.9% were from 25 to 44; 24.3% were from 45 to 64; and 18.7% were 65 years of age or older. The gender makeup of the city was 44.1% male and 55.9% female.
As of the census of 2000, there were 2,662 people, 1,103 households, and 677 families residing in the city. The population density was 1,218.9 people per square mile (471.5/km²). There were 1,211 housing units at an average density of 554.5 per square mile (214.5/km²). The racial makeup of the city was 95.60% White, 2.14% African American, 0.45% Native American, 0.15% Asian, 0.23% from other races, and 1.43% from two or more races. Hispanic or Latino of any race were 0.83% of the population.
There were 1,103 households out of which 33.3% had children under the age of 18 living with them, 40.1% were married couples living together, 17.7% had a female householder with no husband present, and 38.6% were non-families. 35.7% of all households were made up of individuals and 17.8% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 2.97.
In the city, the population was spread out with 26.7% under the age of 18, 9.2% from 18 to 24, 25.9% from 25 to 44, 20.2% from 45 to 64, and 18.0% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 81.5 males. For every 100 females age 18 and over, there were 75.9 males.
The median income for a household in the city was $17,702, and the median income for a family was $23,958. Males had a median income of $31,548 versus $16,976 for females. The per capita income for the city was $12,417. About 28.1% of families and 31.4% of the population were below the poverty line, including 42.7% of those under age 18 and 13.9% of those age 65 or over.