Markham is located in Illinois. Markham, Illinois has a population of 11,733. Markham is less family-centric than the surrounding county with 11.03% of the households containing married families with children. The county average for households married with children is 29.73%.
The median household income in Markham, Illinois is $43,835. The median household income for the surrounding county is $72,121 compared to the national median of $69,021. The median age of people living in Markham is 32.2 years.
The average high temperature in July is 84.2 degrees, with an average low temperature in January of 18.2 degrees. The average rainfall is approximately 38.9 inches per year, with 31.4 inches of snow per year.
