High Quality Content by WIKIPEDIA articles! Template:Chicagoland municipality Tinley Park is a village located primarily in Cook County, Illinois, United States with a small portion in Will County. The population was 48,401 at the 2000 census, and 58,322 in the 2007 census. It is one of the fastest growing suburbs south of Chicago. In 2009, Tinley Park was selected by BusinessWeek as the best place to raise a family in America.