Smithfield is located close to the center of Illinois. Smithfield is part of Fulton County. Smithfield has 0.46 square miles of land area and has no water area. As of 2010-2014, the total Smithfield population is 202, which has shrunk 5.61% since 2000. The population growth rate is much lower than the state average rate of 3.62% and is much lower than the national average rate of 11.61%. Smithfield median household income is $40,417 in 2010-2014 and has grown by 26.18% since 2000. The income growth rate is higher than the state average rate of 22.70% and is about the same as the national average rate of 27.36%. Smithfield median house value is $55,400 in 2010-2014 and has grown by 63.91% since 2000. The house value growth rate is much higher than the state average rate of 34.33% and is higher 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 Smithfield is worse than the state average in quality. The Smithfield area code is 309.