Tinley Park is a city located in Cook County Illinois. With a 2020 population of 55,129, it is the 22nd largest city in Illinois and the 708th largest city in the United States . Tinley Park is currently declining at a rate of -0.58% annually and its population has decreased by -2.78% since the most recent census, which recorded a population of 56,703 in 2010. Tinley Park reached it's highest population of 57,372 in 2013. Spanning over 16 miles, Tinley Park has a population density of 3,423 people per square mile.
The average household income in Tinley Park is $96,371 with a poverty rate of 7.05%. The median rental costs in recent years comes to $1,198 per month, and the median house value is $231,400. The median age in Tinley Park is 40.1 years, 37.4 years for males, and 42.9 years for females.