What is Cook County, Illinois?
{{Infobox settlement | name = Cook County, Illinois | settlement_type = [[County (United States)|County]] | image_skyline = {{Photomontage | photo1a = Richard J. Daley Plaza.jpg | photo2a = Frank LLoyd Wright Studio Chicago Frontage.jpg | photo2b = BusseWoods6.JPG | photo3a = Chicago-00.jpg | photo4a = Evanston, IL Aerial View.jpg | photo4b = Montrose Beach.JPG | spacing = 2 | position = center | color_border = white | color = white | size = 300 | foot_montage = }} | image_size = | image_caption = '''From top, left to right:''' [[Cook County Circuit Court]] at [[Richard J. Daley Center|Daley Center]] with [[Chicago Picasso]], [[Frank Lloyd Wright Home and Studio]], [[Forest Preserve District of Cook County|Forest Preserve District]], aerial view of [[downtown Chicago]], aerial view of [[Evanston, Illinois|Evanston]], [[List of beaches in Chicago#Montrose Avenue Beach|Montrose Avenue Beach]] in Chicago | image_flag = Flag of Cook County, Illinois.svg | flag_size = 120px | image_seal = Seal of Cook County, Illinois.svg | seal_size = 100px | image_map = Map of Illinois highlighting Cook County.svg | map_caption = Location within Illinois | mapsize = 125px | image_map1 = Map of USA IL.svg | map_caption1 = Illinois' location within the United States | mapsize1 = 180px | coordinates = {{coord|41|48|31|N|87|53|20|W|region:US-IL_type:adm2nd|display=inline,title}} | subdivision_type = Country | subdivision_name = United States | subdivision_type1 = [[U.S. state|State]] | subdivision_name1 = [[Illinois]] | subdivision_type2 = Metro area | subdivision_name2 = [[Chicago metropolitan area]] | estab