Olney is a city located in Richland County Illinois. Olney has a 2020 population of 9,625. It is also the county seat of Richland County. Olney is currently declining at a rate of -1.20% annually and its population has decreased by -6.63% since the most recent census, which recorded a population of 10,309 in 2010. Olney reached it's highest population of 10,309 in 2010.
The average household income in Olney is $56,934 with a poverty rate of 17.70%. The median rental costs in recent years comes to $548 per month, and the median house value is $92,500. The median age in Olney is 42.4 years, 40.8 years for males, and 43.5 years for females.