Etna is located in Penobscot county Maine with a geographic area of square miles. The total population in Etna is 1,141 with 57.1% male and 42.9% female. Children under age 5 represent 1.9% of the population, under age 18 equal 19.5% of the population and over age 65 is 19.1% of the population. The median household income is $59,458, per capita income is $25,454. There are a total of 419 housing units with 92.8% owner occupied. Education includes 43.0% of residents that are high school graduates and 11.9% with a bachelor's degree or higher. The average temperature in Etna in the summer is 68 degrees, and in the winter 25 degrees.