Gilbert is located in Maricopa county Arizona with a geographic area of 68.6 square miles. The total population in Gilbert is 248,349 with 48.8% male and 51.2% female. Children under age 5 represent 7.3% of the population, under age 18 equal 29.7% of the population and over age 65 is 9.7% of the population. The median household income is $99,154, per capita income is $39,073. There are a total of 79,714 housing units with 73.5% owner occupied. Education includes 13.2% of residents that are high school graduates and 49.8% with a bachelor's degree or higher. The average temperature in Gilbert in the summer is 83 degrees, and in the winter 49 degrees.