The State of Tennessee is south of the State of Illinois.
Mississippi River
The Mississippi River forms the western border of Illinois.
Mississippi.
Missouri is north, and very slightly east of Arkansas. Kentucky and Illinois are actually northeast, but don't border Arkansas.
Mississippi river
Illinois has the longest common border with Missouri.
Michigan, Ohio, Illinois and Kentucy are the states that border Indiana.
Illinois.
Ohio
The state of Illinois is bordered on the north by the state of Wisconsin. Illinois also shares borders with Iowa to the northwest, Missouri to the west, Kentucky to the southeast, and Indiana to the east. In the northeastern part of the state, Illinois borders Lake Michigan where Chicago is located.
The distance from Chicago to the Illinois border varies depending on the specific location of the border. On average, it is approximately 30-40 miles from downtown Chicago to the Illinois state border.