Okmulgee is located in Okmulgee county Oklahoma with a geographic area of 17.2 square miles. The total population in Okmulgee is 11,768 with 47.1% male and 52.9% female. Children under age 5 represent 5.7% of the population, under age 18 equal 21.4% of the population and over age 65 is 15.1% of the population. The median household income is $31,572, per capita income is $19,564. There are a total of 4,477 housing units with 53.8% owner occupied. Education includes 33.5% of residents that are high school graduates and 12.5% with a bachelor's degree or higher. The average temperature in Okmulgee in the summer is 79 degrees, and in the winter 42 degrees.