Etna is located in Allegheny county Pennsylvania with a geographic area of 0.7 square miles. The total population in Etna is 3,336 with 54.0% male and 46.0% female. Children under age 5 represent 7.0% of the population, under age 18 equal 18.0% of the population and over age 65 is 18.3% of the population. The median household income is $42,219, per capita income is $25,227. There are a total of 1,630 housing units with 54.5% owner occupied. Education includes 40.1% of residents that are high school graduates and 25.2% with a bachelor's degree or higher. The average temperature in Etna in the summer is 73 degrees, and in the winter 33 degrees.