Adena is located in Jefferson county Ohio with a geographic area of 0.5 square miles. The total population in Adena is 682 with 45.7% male and 54.3% female. Children under age 5 represent 3.5% of the population, under age 18 equal 22.9% of the population and over age 65 is 21.7% of the population. The median household income is $34,125, per capita income is $19,832. There are a total of 282 housing units with 74.1% owner occupied. Education includes 62.4% of residents that are high school graduates and 5.7% with a bachelor's degree or higher. The average temperature in Adena in the summer is 73 degrees, and in the winter 32 degrees.