Nilwood is located close to the center of Illinois. Nilwood is part of Macoupin County. Nilwood has 0.47 square miles of land area and has no water area. As of 2010-2014, the total Nilwood population is 226, which has shrunk 20.42% 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%. Nilwood median household income is $41,607 in 2010-2014 and has grown by 28.47% 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%. Nilwood median house value is $65,700 in 2010-2014 and has grown by 25.86% since 2000. The house value growth rate is lower than the state average rate of 34.33% 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 Nilwood is much better than the state average in quality. The Nilwood area code is 217.