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The Mississippi River forms the western border of Illinois.
The Mississippi River forms the western border of Illinois.
The Mississippi River forms the wavy western border of Illinois. And the Ohio Wabash River is the southern border of Illinois.
Mississippi, Tennessee, Illinois and Wisconsin.
The Mississippi River forms the Western border of the States of Illinois, Tennessee, and Mississippi. The Mississippi River forms the Eastern border of the States of Iowa, Missouri, Arkansas, and Louisiana.
Mississippi River
The river that forms the western border of Illinois is the Mississippi River.
Illinois is bordered by the Mississippi River on the west.
Mississippi.
The Mississippi River forms the western border of Illinois. It spans approximately 580 miles and flows through or along the borders of 10 different states in the United States.
The Mississippi River.
Illinois is bordered by the Mississippi River on the west