Manhattan is located in Riley county Kansas with a geographic area of 19.9 square miles. The total population in Manhattan is 55,045 with 51.1% male and 48.9% female. Children under age 5 represent 5.0% of the population, under age 18 equal 15.4% of the population and over age 65 is 8.8% of the population. The median household income is $50,957, per capita income is $27,243. There are a total of 20,629 housing units with 39.7% owner occupied. Education includes 12.0% of residents that are high school graduates and 50.3% with a bachelor's degree or higher. The average temperature in Manhattan in the summer is 78 degrees, and in the winter 32 degrees.