Old Mill Creek is located in Illinois. Old Mill Creek, Illinois has a population of 149. Old Mill Creek is less family-centric than the surrounding county with 20.93% of the households containing married families with children. The county average for households married with children is 38.63%.
The median household income in Old Mill Creek, Illinois is $85,000. The median household income for the surrounding county is $82,613 compared to the national median of $57,652. The median age of people living in Old Mill Creek is 50.2 years.
The average high temperature in July is 81.7 degrees, with an average low temperature in January of 14.6 degrees. The average rainfall is approximately 36.2 inches per year, with 39.5 inches of snow per year.
