Winchester, Missouri  Winchester is a city in St. Louis County, Missouri, United States. The population was 1,547 at the 2010 census. Winchester is located at (38.590003, -90.525756). According to the United States Census Bureau, the city has a total area of , all land. At the 2010 census there were 1,547 people, 596 households, and 386 families living in the city. The population density was . There were 608 housing units at an average density of . The racial makeup of the city was 92.6% White, 1.2% African American, 0.5% Native American, 1.4% Asian, 0.1% Pacific Islander, 1.6% from other races, and 2.7% from two or more races. Hispanic or Latino of any race were 4.4%. Of the 596 households 31.7% had children under the age of 18 living with them, 44.6% were married couples living together, 13.1% had a female householder with no husband present, 7.0% had a male householder with no wife present, and 35.2% were non-families. 29.2% of households were one person and 9.7% were one person aged 65 or older. The average household size was 2.44 and the average family size was 3.02. The median age was 36.8 years. 22% of residents were under the age of 18; 7.3% were between the ages of 18 and 24; 32.5% were from 25 to 44; 22.1% were from 45 to 64; and 16.2% were 65 or older. The gender makeup of the city was 47.8% male and 52.2% female. At the 2000 census there were 1,651 people, 599 households, and 425 families living in the city. The population density was 6,723.0 people per square mile (2,549.8/km²). There were 607 housing units at an average density of 2,471.7 per square mile (937.5/km²). The racial makeup of the city was 95.88% White, 1.27% African American, 0.36% Native American, 0.97% Asian, 0.36% from other races, and 1.15% from two or more races. Hispanic or Latino of any race were 1.88%. Of the 599 households 36.7% had children under the age of 18 living with them, 52.4% were married couples living together, 14.4% had a female householder with no husband present, and 29.0% were non-families. 23.4% of households were one person and 8.2% were one person aged 65 or older.