Olney is located in Illinois. Olney, Illinois has a population of 8,996. Olney is less family-centric than the surrounding county with 25.78% of the households containing married families with children. The county average for households married with children is 26.46%.
The median household income in Olney, Illinois is $55,434. The median household income for the surrounding county is $59,963 compared to the national median of $69,021. The median age of people living in Olney is 40.3 years.
The average high temperature in July is 86.5 degrees, with an average low temperature in January of 20.3 degrees. The average rainfall is approximately 45 inches per year, with 12.3 inches of snow per year.
