Winchester is located in St. louis county Missouri with a geographic area of 0.3 square miles. The total population in Winchester is 1,751 with 50.3% male and 49.7% female. Children under age 5 represent 4.9% of the population, under age 18 equal 20.6% of the population and over age 65 is 13.8% of the population. The median household income is $70,400, per capita income is $25,748. There are a total of 630 housing units with 86.0% owner occupied. Education includes 22.1% of residents that are high school graduates and 26.3% with a bachelor's degree or higher. The average temperature in Winchester in the summer is 77 degrees, and in the winter 32 degrees.
