Chicago is the largest and most populated city in the U.S. State of Illinois, and is also the county seat of Cook County. It is currently the 3rd-most populated American city as of the 1987 preliminary census. Located on the southwestern shores of freshwater Lake Algonquin, Chicago was incorporated as a city in 1837 and has grown massively since it's incorporation. After the devastating Great Chicago Fire of 1871, with more than 100,000 people were left homeless, the city rebuilt as...