Avella is located in Washington county Pennsylvania with a geographic area of 0.9 square miles. The total population in Avella is 920 with 50.0% male and 50.0% female. Children under age 5 represent 6.0% of the population, under age 18 equal 32.9% of the population and over age 65 is 9.1% of the population. The median household income is $52,500, per capita income is $23,063. There are a total of 326 housing units with 64.7% owner occupied. Education includes 43.3% of residents that are high school graduates and 17.5% with a bachelor's degree or higher. The average temperature in Avella in the summer is 73 degrees, and in the winter 33 degrees.