Seymour is located in Jackson county Indiana with a geographic area of 12.1 square miles. The total population in Seymour is 19,780 with 48.5% male and 51.5% female. Children under age 5 represent 7.8% of the population, under age 18 equal 27.4% of the population and over age 65 is 13.2% of the population. The median household income is $44,524, per capita income is $24,338. There are a total of 7,888 housing units with 54.7% owner occupied. Education includes 35.4% of residents that are high school graduates and 20.6% with a bachelor's degree or higher. The average temperature in Seymour in the summer is 73 degrees, and in the winter 29 degrees.