Olney is located in Richland county Illinois with a geographic area of 6.9 square miles. The total population in Olney is 8,872 with 48.6% male and 51.4% female. Children under age 5 represent 6.5% of the population, under age 18 equal 24.6% of the population and over age 65 is 21.0% of the population. The median household income is $49,650, per capita income is $25,755. There are a total of 3,681 housing units with 65.1% owner occupied. Education includes 26.7% of residents that are high school graduates and 20.6% with a bachelor's degree or higher. The average temperature in Olney in the summer is 75 degrees, and in the winter 27 degrees.
