Monessen is located in Westmoreland county Pennsylvania with a geographic area of 2.9 square miles. The total population in Monessen is 7,287 with 45.6% male and 54.4% female. Children under age 5 represent 5.8% of the population, under age 18 equal 20.4% of the population and over age 65 is 22.9% of the population. The median household income is $45,658, per capita income is $28,028. There are a total of 3,430 housing units with 76.6% owner occupied. Education includes 36.6% of residents that are high school graduates and 27.0% with a bachelor's degree or higher. The average temperature in Monessen in the summer is 72 degrees, and in the winter 33 degrees.