Belleville is located in Mifflin county Pennsylvania with a geographic area of 2.0 square miles. The total population in Belleville is 1,838 with 46.0% male and 54.0% female. Children under age 5 represent 4.6% of the population, under age 18 equal 19.5% of the population and over age 65 is 31.1% of the population. The median household income is $52,632, per capita income is $30,774. There are a total of 748 housing units with 63.9% owner occupied. Education includes 39.7% of residents that are high school graduates and 36.1% with a bachelor's degree or higher. The average temperature in Belleville in the summer is 73 degrees, and in the winter 33 degrees.