Lewistown is located in Mifflin county Pennsylvania with a geographic area of 2.0 square miles. The total population in Lewistown is 8,157 with 45.5% male and 54.5% female. Children under age 5 represent 7.1% of the population, under age 18 equal 23.8% of the population and over age 65 is 16.7% of the population. The median household income is $35,599, per capita income is $22,931. There are a total of 3,867 housing units with 44.6% owner occupied. Education includes 45.8% of residents that are high school graduates and 10.2% with a bachelor's degree or higher. The average temperature in Lewistown in the summer is 73 degrees, and in the winter 33 degrees.