Flossmoor () is a village in Cook County, Illinois, United States. The population was 9,464 at the 2010 census.
The village is renowned for its affluence and the quality and architectural variety of its housing stock, as well as its proximity to numerous country clubs.
Flossmoor is located at 41°32′30″N 87°41′6″W (41.541684, -87.684970).
According to the 2010 census, Flossmoor has a total area of 3.66 square miles (9.48 km2), all land. Flossmoor has a station on the Metra Electric Main Line, which provides easy access to the Chicago Loop and the University of Chicago.
Although Flossmoor's founding and settlement can be traced to the 19th-century, the city 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 held in town. Flossmoor was incorporated as a village in 1924. In the years since, Flossmoor has gained recognition from area real estate and tourist concerns as the "status" suburb of south/southwest suburban Chicago. By the 1970s, Flossmoor had transitioned from a white Protestant community to the home of many Jewish Americans and Italian Americans. As of the 2010s, Flossmoor's population is predominantly African American.
As of the census of 2010, there were 9,464 people, 3,447 households, and 2,670 families residing in the village. The population density was 2,585.8 people per square mile (998.4/km2).