Flossmoor is a village in Cook County, Illinois, United States. The population was 9,464 at the 2010 census.
Although Flossmoor has roots in the nineteenth century, it was first recognized as an affluent community in the 1920s when it became known as a cultural and recreational mecca of elite country clubs and stately golf courses. The 1920 PGA Championship and the Western Open golf tournaments of 1906 and 1912 were played in Flossmoor. It was incorporated as a village in 1924. In the years since, Flossmoor was not only seen as the "status" suburb of south/southwest suburban Chicago but also as one of "the fashionable places to "Live In" nationally.