Yorktown is located in Delaware county Indiana with a geographic area of 31.9 square miles. The total population in Yorktown is 11,128 with 47.7% male and 52.3% female. Children under age 5 represent 6.5% of the population, under age 18 equal 25.1% of the population and over age 65 is 18.4% of the population. The median household income is $66,875, per capita income is $34,003. There are a total of 4,376 housing units with 85.6% owner occupied. Education includes 20.6% of residents that are high school graduates and 34.0% with a bachelor's degree or higher. The average temperature in Yorktown in the summer is 73 degrees, and in the winter 29 degrees.