Orland Park is a village in Cook County, Illinois, United States, with a small portion in Will County. It is a suburb of Chicago. Per the 2020 census, Orland Park had a population of 58,703. Located 25 miles (40 km) southwest of Chicago, Orland Park is close to several interstate highways, with the I-80 east-west coast connector as its southern border. The Metra commuter rail system links it to the Chicago Loop and from there to O'Hare and Midway airports.

Cook County is the most populous county in the U.S. state of Illinois and the second-most-populous county in the United States, after Los Angeles County, California. More than 40 percent of all residents of Illinois live within Cook County. As of 2020, the population was 5,275,541. The county seat is Chicago, the most populous city in Illinois and the third most populous city in the United States. The county is at the center of the Chicago metropolitan area.