Troy is located in Lincoln county Missouri with a geographic area of 7.7 square miles. The total population in Troy is 12,457 with 49.6% male and 50.4% female. Children under age 5 represent 6.2% of the population, under age 18 equal 27.6% of the population and over age 65 is 11.8% of the population. The median household income is $68,524, per capita income is $25,684. There are a total of 4,151 housing units with 68.5% owner occupied. Education includes 36.2% of residents that are high school graduates and 20.3% with a bachelor's degree or higher. The average temperature in Troy in the summer is 77 degrees, and in the winter 32 degrees.