Plainfield is located close to the center of Indiana. Plainfield is part of Hendricks County. Plainfield has 22.27 square miles of land area and 0.11 square miles of water area. As of 2010-2014, the total Plainfield population is 29,220, which has grown 58.84% since 2000. The population growth rate is much higher than the state average rate of 7.60% and is much higher than the national average rate of 11.61%. Plainfield median household income is $58,625 in 2010-2014 and has grown by 25.32% since 2000. The income growth rate is higher than the state average rate of 17.25% and is lower than the national average rate of 27.36%. Plainfield median house value is $145,400 in 2010-2014 and has grown by 16.41% since 2000. The house value growth rate is much lower than the state average rate of 30.12% 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 Plainfield is much better than the state average in quality. The Plainfield area code is 317.