Mason is located in Warren county Ohio with a geographic area of 19.3 square miles. The total population in Mason is 33,592 with 51.1% male and 48.9% female. Children under age 5 represent 4.0% of the population, under age 18 equal 27.0% of the population and over age 65 is 13.1% of the population. The median household income is $104,462, per capita income is $52,446. There are a total of 12,470 housing units with 79.0% owner occupied. Education includes 15.0% of residents that are high school graduates and 62.4% with a bachelor's degree or higher. The average temperature in Mason in the summer is 73 degrees, and in the winter 32 degrees.