Byrnes mill is located in Jefferson county Missouri with a geographic area of 5.1 square miles. The total population in Byrnes mill is 2,983 with 54.9% male and 45.1% female. Children under age 5 represent 6.0% of the population, under age 18 equal 23.9% of the population and over age 65 is 16.3% of the population. The median household income is $86,944, per capita income is $36,695. There are a total of 1,136 housing units with 82.6% owner occupied. Education includes 23.6% of residents that are high school graduates and 31.5% with a bachelor's degree or higher. The average temperature in Byrnes mill in the summer is 77 degrees, and in the winter 32 degrees.
