Chicago (Universe 335)

Chicago is the county seat of Cook County, Illinois, and is located on the shores of Lake Michigan in the northeastern part of the state. The city was incorporated in 1837 and grew rapidly in the 1800s because of its westward location, favorable geography and mass immigration in the 19th century that shaped the United States and other countries in the Americas. After the Great Chicago Fire of 1871, the city made a concentrated effort to rebuild, and by 1900, Chicago was one of the largest cities in the world.

Chicago continued to grow into the 20th century, and the majority of the city has experienced urbanization and has been largely developed to accommodate business and inhabitants. Beginning in 2011, the city's infrastructure has been controlled by a computer system known as CTOS. The operating system software controls transport, the Crime Prediction System technology, telecommunications, blockers, drawbridges, and much more. Aiden Pearce is able to hack the system to control all of these functions.

At some point, the skies above Chicago turn red, the city is than destroyed by anti-matter during the Anti-Monitor Crisis, the city and the rest of the universe are then rebuilt after the sacrifice of Oliver Queen.