The distance across Illinois from west to east is approximately 400 miles (640 kilometers). The state stretches from the Mississippi River in the west to the Indiana border in the east. This measurement can vary slightly depending on the specific points chosen for measurement.
Illinois is about 390 miles wide from the eastern border with Indiana to the western border with Iowa.
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The distance across China is approximately 3,250 miles from east to west.
Illinois is farther east, as its western border is mostly on the east bank of the Mississippi River, while across the river to the west are Iowa and Missouri.
Illinois is bordered by Wisconsin Missouri to the west. Ohio is bordered by Pennsylvania to the east. Indiana is EAST of Illinois and WEST of Ohio.
The distance across India from east to west is 2,950 kilometers. From north to south, it is 3,050 kilometers in length.