Harlan is located in Allen county Indiana with a geographic area of 3.1 square miles. The total population in Harlan is 1,715 with 52.9% male and 47.1% female. Children under age 5 represent 6.1% of the population, under age 18 equal 24.0% of the population and over age 65 is 21.4% of the population. The median household income is $65,156, per capita income is $29,717. There are a total of 655 housing units with 86.6% owner occupied. Education includes 30.2% of residents that are high school graduates and 11.5% with a bachelor's degree or higher. The average temperature in Harlan in the summer is 73 degrees, and in the winter 29 degrees.