Plainfield is located in east Ohio. Plainfield is part of Coshocton County. Plainfield has 0.41 square miles of land area and has no water area. As of 2010-2014, the total Plainfield population is 169, which has grown 6.96% since 2000. The population growth rate is much higher than the state average rate of 1.83% and is lower than the national average rate of 11.61%. Plainfield median household income is $56,667 in 2010-2014 and has grown by 42.30% since 2000. The income growth rate is much higher than the state average rate of 19.27% and is much higher than the national average rate of 27.36%. Plainfield median house value is $68,300 in 2010-2014 and has grown by 24.18% 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 Plainfield is better than the state average in quality. The Plainfield area code is 740.