Cook County

Cook County is not a company but a county located in the U.S. state of Illinois, with Chicago as its county seat. As a governmental entity, it provides numerous services to its residents including public health, safety, and justice services, as well as infrastructure and public transit. Established in 1831 and named after Daniel Cook, a pioneer lawyer, it's one of the most populous counties in the U.S., with offices and facilities primarily located within its jurisdiction in Illinois.