Middleburg is located close to the center of Florida. Middleburg is part of Clay County. Middleburg has 19.56 square miles of land area and has no water area. As of 2010-2014, the total Middleburg population is 13,042, which has grown 26.16% since 2000. The population growth rate is much higher than the state average rate of 21.14% and is much higher than the national average rate of 11.61%. Middleburg median household income is $47,856 in 2010-2014 and has grown by 4.67% since 2000. The income growth rate is much lower than the state average rate of 21.62% and is much lower than the national average rate of 27.36%. Middleburg median house value is $115,500 in 2010-2014 and has grown by 17.62% since 2000. The house value growth rate is much lower than the state average rate of 48.06% 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 Middleburg is much better than the state average in quality. The Middleburg area code is 904.