Bellevue is located in Allegheny county Pennsylvania with a geographic area of 1.0 square miles. The total population in Bellevue is 8,088 with 46.7% male and 53.3% female. Children under age 5 represent 3.5% of the population, under age 18 equal 12.1% of the population and over age 65 is 15.9% of the population. The median household income is $49,991, per capita income is $36,631. There are a total of 4,425 housing units with 37.9% owner occupied. Education includes 21.8% of residents that are high school graduates and 48.0% with a bachelor's degree or higher. The average temperature in Bellevue in the summer is 73 degrees, and in the winter 33 degrees.