Las vegas is located in Clark county Nevada with a geographic area of 141.8 square miles. The total population in Las vegas is 644,594 with 49.9% male and 50.1% female. Children under age 5 represent 6.3% of the population, under age 18 equal 23.7% of the population and over age 65 is 14.9% of the population. The median household income is $58,377, per capita income is $31,521. There are a total of 237,308 housing units with 53.4% owner occupied. Education includes 24.5% of residents that are high school graduates and 28.0% with a bachelor's degree or higher. The average temperature in Las vegas in the summer is 84 degrees, and in the winter 48 degrees.