Oak Forest is a city located in Cook County Illinois. With a 2020 population of 26,797, it is the 80th largest city in Illinois and the 1439th largest city in the United States . Oak Forest is currently declining at a rate of -0.70% annually and its population has decreased by -4.17% since the most recent census, which recorded a population of 27,962 in 2010. Oak Forest reached it's highest population of 28,223 in 2013. Spanning over 6 miles, Oak Forest has a population density of 4,460 people per square mile.
The average household income in Oak Forest is $89,621 with a poverty rate of 5.33%. The median rental costs in recent years comes to $1,080 per month, and the median house value is $194,200. The median age in Oak Forest is 41.8 years, 38.7 years for males, and 44.1 years for females.