Mark is located in Illinois. Mark, Illinois 61340has a population of 520. Mark 61340 is less family-centric than the surrounding county with 20% households with children. The county percentage for households with children is 22%.
The median household income in Mark, Illinois 61340 is $68,214. The median household income for the surrounding county is $65,000 compared to the national median of $66,222. The median age of people living in Mark 61340 is 41.8 years.
The average high temperature in July is 86.2 degrees, with an average low temperature in January of 13.2 degrees. The annual precipitation is 34.45.