
Big Bay de Noc is a bay in the Upper Peninsula of the U.S. state of Michigan. The bay, which opens into Lake Michigan's Green Bay, is enclosed by Delta County. The small Delta County settlements of Garden and Nahma are harbors on the shore of the bay.

Detroit Harbor is a bay between the southern end of Washington Island, and the northern end of Detroit Island. It is located in Washington, Door County, Wisconsin. An unincorporated community also named Detroit Harbor is found on the northern side of the bay. There are three islands inside of the bay, Snake Island, Big Susie Island, and Little Susie Island. The bay is dredged on either side to allow boats through, forming the East and West channels. The car ferry to Washington Island goes through Detroit Harbor, before it docks.

Grand Traverse Bay is a deep bay of Lake Michigan formed by the Leelanau Peninsula in the northwestern Lower Peninsula of Michigan. The bay is 32 miles (51 km) long, 10 mi (16 km) wide, and up to 620 feet (190 m) deep in spots. It is divided into two arms by the Old Mission Peninsula. The entire bay is conterminous with the Grand Traverse Bay Bottomland Preserve. It should not be confused with Grand Traverse Bay of Lake Superior, located on the Keweenaw Peninsula.

Green Bay is an arm of Lake Michigan, located along the south coast of Michigan's Upper Peninsula and the east coast of Wisconsin. It is separated from the rest of the lake by the Door Peninsula in Wisconsin, the Garden Peninsula in Michigan, and the chain of islands between them, all formed by the Niagara Escarpment. Green Bay is some 120 miles (193 km) long, with a width ranging from about 10 to 20 miles ; it is 1,626 square miles (4,210 km2) in area.

Little Bay de Noc is a bay in the Upper Peninsula of the U.S. state of Michigan. The bay opens into Lake Michigan's Green Bay.

Little Traverse Bay is a small bay, 170 feet deep, off Lake Michigan in the northern area of the Lower Peninsula of Michigan. The cities of Harbor Springs and Petoskey are located on this bay.

Sturgeon Bay is an arm of Green Bay extending southeastward approximately 10 miles into the Door Peninsula at the city of Sturgeon Bay, located approximately halfway up the Door Peninsula. The bay is connected to Lake Michigan by the Sturgeon Bay Ship Canal.