Millheim is located in Centre county Pennsylvania with a geographic area of 1.3 square miles. The total population in Millheim is 522 with 54.2% male and 45.8% female. Children under age 5 represent 4.6% of the population, under age 18 equal 18.2% of the population and over age 65 is 14.4% of the population. The median household income is $54,135, per capita income is $31,093. There are a total of 247 housing units with 73.7% owner occupied. Education includes 40.5% of residents that are high school graduates and 25.1% with a bachelor's degree or higher. The average temperature in Millheim in the summer is 73 degrees, and in the winter 33 degrees.