Posen is located in northeast Illinois. Posen is part of Cook County. Posen has 1.17 square miles of land area and has no water area. As of 2010-2014, the total Posen population is 5,934, which has grown 25.45% since 2000. The population growth rate is much higher than the state average rate of 3.62% and is much higher than the national average rate of 11.61%. Posen median household income is $41,496 in 2010-2014 and has has shrunk by 16.12% since 2000. The income growth rate is much lower than the state average rate of 22.70% and is much lower than the national average rate of 27.36%. Posen median house value is $112,000 in 2010-2014 and has shrunk by -22.14% since 2000. The house value growth rate is much 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 Posen is worse than the state average in quality. The Posen area code is 708.