Walnut is located in north Illinois. Walnut is between the Bureau, Lee county. Walnut has 0.83 square miles of land area and has no water area. As of 2010-2014, the total Walnut population is 1,520, which has grown 4.04% since 2000. The population growth rate is about the same as the state average rate of 3.62% and is much lower than the national average rate of 11.61%. Walnut median household income is $53,750 in 2010-2014 and has grown by 33.62% since 2000. The income growth rate is higher than the state average rate of 22.70% and is higher than the national average rate of 27.36%. Walnut median house value is $89,700 in 2010-2014 and has grown by 32.30% since 2000. The house value growth rate is lower than the state average rate of 34.33% and is 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 Walnut is better than the state average in quality. The Walnut area code is 815.