2,398 square miles.
Libertyville, Illinois, USA - 9.1 square miles.
Springfield, Illinois, USA - 60.3 square miles.
Johnson County, Illinois, USA - 349 square miles.
Illinois' area is 57,900 square miles or 37,055,848.2 acres.
Illinois is approximately 57,914 square miles in size.
57,918 sq mi
twenty eight
Cook County, Illinois, USA - 1,635 square miles.
Illinois, USA - 57,918 square miles (USA's 25th largest state).
Illinois has a total area of around 57,914 square miles.
Illinois covers an area of 57,914 square miles.