Vermillion is located in Clay county South dakota with a geographic area of 4.6 square miles. The total population in Vermillion is 10,852 with 48.4% male and 51.6% female. Children under age 5 represent 4.8% of the population, under age 18 equal 13.8% of the population and over age 65 is 9.7% of the population. The median household income is $43,750, per capita income is $28,684. There are a total of 3,932 housing units with 45.5% owner occupied. Education includes 16.7% of residents that are high school graduates and 49.3% with a bachelor's degree or higher. The average temperature in Vermillion in the summer is 74 degrees, and in the winter 15 degrees.