Hayward is located in Alameda county California with a geographic area of 45.8 square miles. The total population in Hayward is 158,817 with 49.8% male and 50.2% female. Children under age 5 represent 5.8% of the population, under age 18 equal 20.9% of the population and over age 65 is 12.5% of the population. The median household income is $91,490, per capita income is $35,983. There are a total of 47,467 housing units with 55.1% owner occupied. Education includes 22.6% of residents that are high school graduates and 33.8% with a bachelor's degree or higher. The average temperature in Hayward in the summer is 66 degrees, and in the winter 43 degrees.