Mark is located in Illinois. Mark, Illinois has a population of 495. Mark is more family-centric than the surrounding county with 36.03% of the households containing married families with children. The county average for households married with children is 25.46%.
The median household income in Mark, Illinois is $68,333. The median household income for the surrounding county is $67,419 compared to the national median of $69,021. The median age of people living in Mark is 44.2 years.
The average high temperature in July is 85.5 degrees, with an average low temperature in January of 14.4 degrees. The average rainfall is approximately 37.9 inches per year, with 22.4 inches of snow per year.
