While most accounts agree that the state name "Illinois" comes from the tribe of Native Americans living there when the area was first explored by Europeans, exactly who brought the name into the English language is not clear. Folk etymologies have arisen to explain the name, although they do not necessarily align with the linguistic evidence.
As of 2010, the city of Chicago has an area of 227.63 square miles, including 26 miles of lakefront land and 15 miles of beaches. Chicago has a population of 2,695,598 people, or 11,841.8 persons per square mile, making it the third largest city in the United States.
There is no accepted or conclusive answer as to why Indiana is referred to as the Hoosier State. The first known reference to the word "hoosier" dates back to 1827 when it was used in a letter, states the Indiana Historical Society.