Marysville is located in Union county Ohio with a geographic area of 16.1 square miles. The total population in Marysville is 24,569 with 44.9% male and 55.1% female. Children under age 5 represent 6.1% of the population, under age 18 equal 21.4% of the population and over age 65 is 10.7% of the population. The median household income is $79,016, per capita income is $38,413. There are a total of 8,786 housing units with 69.4% owner occupied. Education includes 30.8% of residents that are high school graduates and 37.4% with a bachelor's degree or higher. The average temperature in Marysville in the summer is 72 degrees, and in the winter 32 degrees.