Allen is located in Pontotoc county Oklahoma with a geographic area of 0.9 square miles. The total population in Allen is 1,024 with 41.3% male and 58.7% female. Children under age 5 represent 2.7% of the population, under age 18 equal 22.2% of the population and over age 65 is 30.6% of the population. The median household income is $25,667, per capita income is $19,998. There are a total of 450 housing units with 52.4% owner occupied. Education includes 55.1% of residents that are high school graduates and 15.6% with a bachelor's degree or higher. The average temperature in Allen in the summer is 80 degrees, and in the winter 42 degrees.