Henderson is located in Clark county Nevada with a geographic area of 106.2 square miles. The total population in Henderson is 309,955 with 49.5% male and 50.5% female. Children under age 5 represent 4.9% of the population, under age 18 equal 21.1% of the population and over age 65 is 20.3% of the population. The median household income is $75,430, per capita income is $40,796. There are a total of 120,735 housing units with 64.3% owner occupied. Education includes 19.4% of residents that are high school graduates and 38.3% with a bachelor's degree or higher. The average temperature in Henderson in the summer is 87 degrees, and in the winter 48 degrees.