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Mark is located in Illinois. Mark, Illinois has a population of 512. Mark is less family-centric than the surrounding county with 18% of the households containing married families with children. The county average for households married with children is 22%.
The median household income in Mark, IL is $67,308. The median household income for the surrounding county is $64,752 compared to the national median of $61,963. The median age of people living in Mark is 42 years old.Learn more about Real Estate.