Hilo is located in Hawaii county Hawaii with a geographic area of 53.6 square miles. The total population in Hilo is 45,248 with 48.9% male and 51.1% female. Children under age 5 represent 4.5% of the population, under age 18 equal 21.1% of the population and over age 65 is 21.1% of the population. The median household income is $65,727, per capita income is $31,246. There are a total of 16,225 housing units with 62.0% owner occupied. Education includes 22.5% of residents that are high school graduates and 37.0% with a bachelor's degree or higher. The average temperature in Hilo in the summer is 85 degrees, and in the winter 78 degrees.