West mifflin is located in Allegheny county Pennsylvania with a geographic area of 14.2 square miles. The total population in West mifflin is 19,742 with 50.7% male and 49.3% female. Children under age 5 represent 5.1% of the population, under age 18 equal 22.2% of the population and over age 65 is 18.8% of the population. The median household income is $54,474, per capita income is $29,556. There are a total of 8,350 housing units with 79.0% owner occupied. Education includes 36.4% of residents that are high school graduates and 20.6% with a bachelor's degree or higher. The average temperature in West mifflin in the summer is 73 degrees, and in the winter 33 degrees.
