Markham is located in northeast Illinois. Markham is part of Cook County. Markham has 5.31 square miles of land area and has no water area. As of 2010-2014, the total Markham population is 12,625, which has grown 0.04% since 2000. The population growth rate is lower than the state average rate of 3.62% and is much lower than the national average rate of 11.61%. Markham median household income is $34,055 in 2010-2014 and has has shrunk by 18.12% 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%. Markham median house value is $103,200 in 2010-2014 and has shrunk by -37.23% since 2000. The house value growth rate is higher 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 Markham is worse than the state average in quality. The Markham area code is 708.