Stillwater is located in Payne county Oklahoma with a geographic area of 29.8 square miles. The total population in Stillwater is 50,183 with 50.6% male and 49.4% female. Children under age 5 represent 4.2% of the population, under age 18 equal 14.5% of the population and over age 65 is 10.1% of the population. The median household income is $34,906, per capita income is $23,644. There are a total of 19,741 housing units with 39.2% owner occupied. Education includes 16.2% of residents that are high school graduates and 44.0% with a bachelor's degree or higher. The average temperature in Stillwater in the summer is 80 degrees, and in the winter 42 degrees.