Middlefield is located in northeast Ohio. Middlefield is between the Geauga, Ashtabula, Trumbull county. Middlefield has 3.02 square miles of land area and 0.02 square miles of water area. As of 2010-2014, the total Middlefield population is 2,707, which has grown 21.23% since 2000. The population growth rate is much higher than the state average rate of 1.83% and is much higher than the national average rate of 11.61%. Middlefield median household income is $42,165 in 2010-2014 and has grown by 9.29% since 2000. The income growth rate is much lower than the state average rate of 19.27% and is much lower than the national average rate of 27.36%. Middlefield median house value is $152,000 in 2010-2014 and has grown by 25.31% since 2000. The house value growth rate is about the same as the state average rate of 24.98% and is much lower than the national average rate of 46.91%. As a reference, the national Consumer Price Index (CPI) inflation rate for the same period is 26.63%. On average, the public school district that covers Middlefield is better than the state average in quality. The Middlefield area code is 440.