Oak Park, Illinois is a suburb just west of Chicago in Cook County, Illinois, United States. Oak Park has easy access to downtown Chicago thanks to public transportation such as the Chicago 'L', CTA buses, and Metra commuter rail. As of the 2000 census, the area had a total population of 52,524. A census estimate for 2003 showed that the population had dipped to 50,824. Oak Park apartments for rent comparison page shows most up to date rent information on Oak Park apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.