Middlefield is located in Geauga county Ohio with a geographic area of 3.4 square miles. The total population in Middlefield is 2,698 with 42.4% male and 57.6% female. Children under age 5 represent 2.0% of the population, under age 18 equal 14.5% of the population and over age 65 is 31.5% of the population. The median household income is $53,525, per capita income is $28,870. There are a total of 1,381 housing units with 59.7% owner occupied. Education includes 39.8% of residents that are high school graduates and 28.5% with a bachelor's degree or higher. The average temperature in Middlefield in the summer is 73 degrees, and in the winter 32 degrees.