<P> Lake Michigan has a surface area of 22,404 sq. mi ( 58,026 km ) ; ( 13,237 square miles , 34,284 km lying in Michigan state , 7,358 square miles , 19,056 km in Wisconsin , 234 square miles , 606 km in Indiana , & 1,576 square miles , 4,079 km in Illinois ) making it the largest lake entirely within one country by surface area ( Lake Baikal , in Russia , is larger by water volume ) , and the fifth - largest lake in the world . It is the larger half of Lake Michigan -- Huron , which is the largest body of fresh water in the world by surface area . It is 307 miles ( 494 km ) long by 118 miles ( 190 km ) wide with a shoreline 1,640 miles ( 2,640 km ) long . The lake 's average depth is 46 fathoms 3 feet ( 279 ft ; 85 m ) , while its greatest depth is 153 fathoms 5 feet ( 923 ft ; 281 m ) . It contains a volume of 1,180 cubic miles ( 4,918 km3 ) of water . Green Bay in the northwest is its largest bay . Grand Traverse Bay in its northeast is another large bay . Its deepest region , which lies in its northern - half , is called Chippewa Basin ( named after prehistoric Lake Chippewa ) and is separated from South Chippewa Basin , by a relatively shallower area called the Mid Lake Plateau . </P>
<P> Lake Michigan has a surface area of 22,404 sq. mi ( 58,026 km ) ; ( 13,237 square miles , 34,284 km lying in Michigan state , 7,358 square miles , 19,056 km in Wisconsin , 234 square miles , 606 km in Indiana , & 1,576 square miles , 4,079 km in Illinois ) making it the largest lake entirely within one country by surface area ( Lake Baikal , in Russia , is larger by water volume ) , and the fifth - largest lake in the world . It is the larger half of Lake Michigan -- Huron , which is the largest body of fresh water in the world by surface area . It is 307 miles ( 494 km ) long by 118 miles ( 190 km ) wide with a shoreline 1,640 miles ( 2,640 km ) long . The lake 's average depth is 46 fathoms 3 feet ( 279 ft ; 85 m ) , while its greatest depth is 153 fathoms 5 feet ( 923 ft ; 281 m ) . It contains a volume of 1,180 cubic miles ( 4,918 km3 ) of water . Green Bay in the northwest is its largest bay . Grand Traverse Bay in its northeast is another large bay . Its deepest region , which lies in its northern - half , is called Chippewa Basin ( named after prehistoric Lake Chippewa ) and is separated from South Chippewa Basin , by a relatively shallower area called the Mid Lake Plateau . </P>
how wide is lake michigan at its widest point
how wide is lake michigan at its widest point
118 miles ( 190 km )
118 miles ( 190 km )