St. clair is located in Franklin county Missouri with a geographic area of 4.8 square miles. The total population in St. clair is 4,702 with 50.9% male and 49.1% female. Children under age 5 represent 8.4% of the population, under age 18 equal 23.9% of the population and over age 65 is 15.1% of the population. The median household income is $40,947, per capita income is $21,411. There are a total of 1,908 housing units with 62.6% owner occupied. Education includes 42.2% of residents that are high school graduates and 11.3% with a bachelor's degree or higher. The average temperature in St. clair in the summer is 77 degrees, and in the winter 32 degrees.
