Vincennes is located in Knox county Indiana with a geographic area of 7.4 square miles. The total population in Vincennes is 17,091 with 49.4% male and 50.6% female. Children under age 5 represent 5.5% of the population, under age 18 equal 19.3% of the population and over age 65 is 16.5% of the population. The median household income is $39,994, per capita income is $23,862. There are a total of 7,287 housing units with 46.2% owner occupied. Education includes 34.0% of residents that are high school graduates and 13.7% with a bachelor's degree or higher. The average temperature in Vincennes in the summer is 74 degrees, and in the winter 29 degrees.