Mill Creek is located in Illinois. Mill Creek, Illinois has a population of 37. Mill Creek is less family-centric than the surrounding county with 0% of the households containing married families with children. The county average for households married with children is 27.07%.
The median household income in Mill Creek, Illinois is $93,000. The median household income for the surrounding county is $46,716 compared to the national median of $57,652. The median age of people living in Mill Creek is 52.5 years.
The average high temperature in July is 88.8 degrees, with an average low temperature in January of 23 degrees. The average rainfall is approximately 47.3 inches per year, with 11.5 inches of snow per year.