| About Chicago Chicago is the largest city in the U.S. state of Illinois, and is located along the southwestern shore of freshwater Lake Michigan. With over 2.8 million people, Chicago is the third-most populous city in the U.S., and the largest city in the Midwest. The Chicago metropolitan area (commonly referred to as Chicagoland) has a population of over 9.5 million people living in three U.S. states (Illinois, Indiana and Wisconsin) and was the third largest U.S. metropolitan area in 2000. Chicago is 26th by population and 686th by population density among the world's largest urban areas and the fourth largest city in North America. After a series of wars with the local American Natives, Chicago was founded in 1833, near a portage between the Great Lakes and the Mississippi River watershed, and incorporated as a city in 1837. The city became a major transportation and telecommunications hub in North America.[4] O'Hare International is the second busiest airport in the world. Chicago is also a major business, financial, and industrial center. The city is a stronghold of the Democratic Party, and Chicago has been home to influential politicians, including the current President of the United States, Barack Obama. City Demographics:
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