Schaumburg is a village located mostly in Cook County and partly in DuPage County in northeastern Illinois, United States. Per the 2020 Census, the population was 78,723, making Schaumburg the most populous incorporated village in the United States. Schaumburg is around 28 miles (45 km) northwest of the Chicago Loop and 10 miles (16 km) northwest of O'Hare International Airport. It is part of the Golden Corridor.

The Schaumburg Township District Library (STDL), located in Schaumburg, Illinois, is the second largest public library in Illinois. It serves the Schaumburg Township area, covering sections of Schaumburg, Hoffman Estates, Hanover Park, Roselle, and Elk Grove Village. Both Hoffman Estates and Hanover Park have branch libraries located in the villages. Annual circulation of materials totals approximately two million items, while nearly one million people visit the library each year.