There are 1788 Fast Food Restaurants in Cook County, Illinois, serving a population of 5,238,541 people in an area of 946 square miles. There is 1 Fast Food Restaurant per 2,929 people, and 1 Fast Food Restaurant per square mile.
In Illinois, Cook County is ranked 43rd of 102 counties in Fast Food Restaurants per capita, and 1st of 102 counties in Fast Food Restaurants per square mile.