The following is a list of named islands of the state of Wisconsin. According to the USGS, there are 431 named islands, and many more unnamed ones among Wisconsin's 15,074 lakes.Wisconsin Dept. of Natural Resources, Wisconsin Lakes . 2009. Wisconsin borders both Lake Michigan and Lake Superior producing many of the state's islands. The Mississippi River also has many islands on the state's western boundary. Wisconsin has many rivers including the Wisconsin River and Fox River.
Great Lakes Lake Michigan Many of the Wisconsin's islands in Lake Michigan are around the Door Peninsula. Islands in Green Bay include those in and around the Green Bay Breakwater. Washington Island is Wisconsin's largest in Lake Michigan and also has a year-round population of 708 as of the 2010 census. The island has a ferry service and operates Washington Island Airport for air travel. Rock Island is a state park that can only be accessed by ferry from Washington Island. Plum Island is home to a former Coast Guard Life-Saving Station and historic range lights. The islands surrounding the northern part of the peninsula are outcroppings of the Niagara Escarpment.
Island Name County Area (acres) Area (hectares) Area (sq mi) CoordinatesAdventure IslandDoor 0.06Big Sister IslandDoor 0.01Big Susie IslandDoor 0.02Birds Tree IslandBrown <0.01Cana IslandDoor 0.01Cat IslandBrown <0.01Chambers IslandDoor 3.88Detroit IslandDoor 1.00Fish IslandDoor <0.01Grassy IslandBrown <0.01Gravel IslandDoor 0.01Green IslandMarinette 0.03Hat IslandDoor 0.01Hog IslandDoor <0.01Horseshoe IslandDoor 0.05Jack IslandDoor <0.01Little Sister IslandDoor <0.01Little Strawberry IslandDoor <0.01Little Susie IslandDoor <0.01Pilot IslandDoor 0.01Pirate IslandDoor <0.01Plum IslandDoor 0.46Rock IslandDoor 1.52Snake Island (Town of Nasewaupee)Door 0.04Snake Island (Town of Washington)Door <0.01Spider IslandDoor 0.04Squaw IslandDoor 0.01Texas RockMilwaukeeSee below note*Washington IslandDoor 23.51Willow IslandBrown <0.01 Texas Rock is officially classified as an island, but is only above the surface of the water with very low water levels.
Lake Superior Wisconsin's northernmost point is on Devils Island, part of the Apostle Islands in Lake Superior. It has a population of 302 as of the 2010 census. It can be reached by ferry and airplanes at Major Gilbert Field Airport. The Islands are part of the Apostle Islands National Lakeshore and are featured in Wisconsin's America the Beautiful quarter.
Island Name County Area (acres) Area (hectares) Area (sq mi) CoordinatesBarker's IslandDouglas 0.09Basswood IslandAshland 2.99Bear IslandAshland 2.83Cat IslandAshland 2.09Devils IslandAshland 0.48Eagle IslandBayfield 0.04Gull IslandAshland 0.01Hermit IslandAshland 1.23Hog IslandDouglas 0.09Ironwood IslandAshland 1.04Long IslandAshland 0.48Madeline IslandAshland 24.00Manitou IslandAshland 2.07Michigan IslandAshland 2.40North Twin IslandAshland 0.26Oak IslandAshland 7.85Otter IslandAshland 2.07Outer IslandAshland 12.28Raspberry IslandBayfield 0.45Rocky IslandAshland 1.64Sand IslandBayfield 4.47South Twin IslandAshland 0.53Stockton IslandAshland 15.46York IslandBayfield 0.43
Inland Lake and River Islands There are 377 named islands in inland lakes, rivers and marshes, and many more unnamed islands. Over half of the named islands are in the Mississippi River, Wisconsin River, Beaver Dam Lake or Horicon Marsh.
Island Name County Body of Water Area (sq mi) Area Coordinates Ajax Island Oconto Oconto River
Allen Island Crawford Wisconsin River
Ames Island Dodge Horicon Marsh <0.01 <0.026
Amik Island Douglas Saint Louis River
Anchor Island Iron Pine Lake <0.01 <0.026
Anderson Island Bayfield Namekagon Lake
Ansul Islands Marinette Menominee River
Anthony Island Dodge Sinnissippi Lake
Antigo Island Oneida Pelican Lake
Apple Island Dodge Horicon Marsh <0.01 <0.026
Arrowhead Island La Crosse Mississippi River
Babbs Island Sawyer Flambeau River
Babe Island Dodge Beaver Dam Lake <0.01 <0.026
Baby Fourmile Island Dodge Horicon Marsh <0.01 <0.026
Baker Island Marinette Menominee River
Bald Eagle Island Polk Bone Lake
Balls Island Grant Mississippi River
Barkers Island Marathon Wisconsin River
Barron Island La Crosse Mississippi River
Bass Island Florence Bass Lake <0.01 <0.026
Battle Island Buffalo Chippewa River
Battle Island Vernon Mississippi River
Bear Island Polk Balsam Lake <0.01 <0.026
Bedker Island Dodge Beaver Dam Lake <0.01 <0.026
Beggs Island Waukesha Lac La Belle
Bell Island La Crosse Mississippi River ? ?
Bell Island Columbia Lake Wisconsin <0.01 <0.026 43°21'20.5"N 89°38'04.0"W Belle Island Vilas Mamie Lake
Belle Island Wood Wisconsin River
Bergman Island Crawford Mississippi River
Bertom Island Grant McCartney Lake
Beulah Island Walworth Lake Beulah
Big Banana Island Sawyer Chippewa Flowage
Big Island Burnett Saint Croix River
Big Island Iron Turtle-Flambeau Flowage
Big Island Marathon Wisconsin River
Big Island Oneida Squash Lake <0.01 <0.026
Big Island Polk Balsam Lake
Big Island Richland Wisconsin River
Big Island Sawyer Nelson Lake
Big Island Wood Wisconsin River
Big Ripley Island Oneida Kawaguesaga Lake
Big Skunk Island Dodge Beaver Dam Lake <0.01 <0.026
Big Timber Island Sawyer Chippewa Flowage
Birch Island Sawyer Chippewa Flowage
Bird Island Sawyer Teal Lake <0.01 <0.026
Black Oak Island Trempealeau Mississippi River
Blackbird Island Winnebago Lake Winnebago <0.01 <0.026
Blackhawk Island Juneau Wisconsin River
Blueberry Island Marinette Menominee River
Bonies Mound Iron Turtle-Flambeau Flowage <0.01 <0.026
Boom Island Marinette Menominee River
Wet Beard Island Winnebago Wolf River
Boomerang Island Vernon Mississippi River
Bradys Island Barron Hemlock Lake <0.01 <0.026
Brecker Island Dodge Horicon Marsh
Broken Bow Island Vernon Mississippi River
Broken Gun Island La Crosse Mississippi River
Brunet Island Chippewa Cornell Flowage
Brush Island Dunn Chippewa River
Brushwood Island Dodge Fox Lake
Bubar Island Douglas Saint Croix Flowage
Buckeye Island Dodge Beaver Dam Lake <0.01 <0.026
Bucks Island Buffalo Mississippi River
Buffalo Island Buffalo Chippewa River
Bullrush Island Buffalo Mississippi River
Bunyans Hat Island Rusk Dairyland Reservoir
Butternut Island Dodge Sinnissippi Lake
Carlson Island Polk Balsam Lake
Cedar Island Iowa Wisconsin River
Cedar Island Polk Balsam Lake <0.01 <0.026
Champaign Island Bayfield Namekagon Lake <0.01 <0.026
Chippewa Island Dunn Chippewa River
Clare Island Sauk Lake Delton <0.01 <0.026
Clark Island Adams & Juneau Wisconsin River
Clough Island Douglas Saint Louis River
Clubhouse Island Dodge Horicon Marsh
Clumbs Island Oneida Lake Minocqua <0.01 <0.026
Coleman Islands Dodge Horicon Marsh
Coles Island Dodge Rock River
Colin Island Vilas Upper Bucktabon Lake
Cormorant Island La Crosse Mississippi River
Cotton Island Dodge Horicon Marsh
Coumbe Island Grant Wisconsin River
Crane Island Dodge Sinnissippi Lake
Crane Island Vernon Mississippi River ? ?
Crats Island Buffalo Mississippi River
Crescent Island Oneida Pelican Lake <0.01 <0.026
Crownhart Island Douglas Upper Saint Croix Lake
Cuba Island Dodge Beaver Dam Lake <0.01 <0.026
Darrow Island Sawyer Chippewa Flowage
Dead Island Dodge Fox Lake <0.01 <0.026
Dead Island Oneida Tomahawk Lake <0.01 <0.026
Dead Lake Island Pepin Chippewa River
Deakin Island Walworth Middle Lake
Deep Hole Island Buffalo Mississippi River
Deer Island Jackson Unnamed marsh
Deer Island Oconto Wheeler Lake <0.01 <0.026
Deer Island Pepin Mississippi River ? ?
Deer Island Sauk Wisconsin River ? ?
Deer Toe Island Buffalo Mississippi River
Denby Island Oneida Medicine Lake
Devil Island Dodge Fox Lake <0.01 <0.026
Dewings Island Walworth Mill Lake
Diamond Island Dodge Rock River ? ?
Diamond Island Pierce Mississippi River
Dodes Island Sawyer Flambeau River <0.01 <0.026
Doty Island Winnebago Fox River
Drescher Island Jackson Unnamed marsh ? ?
Duck Island Vilas Lac Vieux Desert
Dutchman Islands Juneau Wisconsin River
Eagle Island Florence Middle Lake <0.01 <0.026
Eagle Island Vernon Mississippi River
Eagles Nest Island Sawyer Chippewa Flowage
East Island Vernon Mississippi River <0.01 <0.026
Edwards Island Wood Wisconsin River
Elmwood Island Dodge Fox Lake
Everbreeze Island Oneida Manson Lake <0.01 <0.026
Evergreen Island Dodge Beaver Dam Lake <0.01 <0.026
Fairy Island Walworth Booth Lake <0.01 <0.026
Faust Island Barron Red Cedar Lake <0.01 <0.026
Feather Island Crawford Wisconsin River
Fiefield Island Oneida Kawaguesaga Lake
Fields Island Portage Wisconsin River
First Island Polk Balsam Lake <0.01 <0.026
Fisher Island Dodge Beaver Dam Lake <0.01 <0.026
Fishers Island Oneida Lake Minocqua
Five Islands Menominee Wolf River
Flat Island Sawyer Chippewa Flowage
Folson Island Sawyer Moose Lake <0.01 <0.026
Fourmile Island Dodge Horicon Marsh
Fox Island Vilas Rest Lake
French Island Clark Black River <0.01 <0.026
French Island La Crosse Mississippi River
Frog Island Vilas High Lake
Gangster Island Vilas North Twin Lake Garbutt Island Sawyer Lake Chetac ? ?
Gardner Island Dodge Horicon Marsh <0.01 <0.026
Garlic Island or Island Park Winnebago Lake Winnebago
Garrison Island Wood Wisconsin River
Goose Island Dodge Beaver Dam Lake <0.01 <0.026
Goose Island Dodge Horicon Marsh
Goose Island La Crosse & Vernon Mississippi River
Government Island Waupaca Chain O' Lakes
Governors Island Dane Lake Mendota
Grape Island Dane & Iowa Wisconsin River
Grape Island Dodge Beaver Dam Lake <0.01 <0.026
Grassy Island Vernon Mississippi River
Gravel Island Chippewa Chippewa River ? ?
Green Island La Crosse Mississippi River
Green Island Oconto Leigh Flowage
Greenwing Island Vernon Mississippi River <0.01 <0.026
Grutt Island Sawyer Lake Chetac
Hacklin Island Crawford Wisconsin River
Hall Island Dodge Horicon Marsh
Happy Island Dunn Chippewa River
Harris Island Crawford Wisconsin River
Hawk Island Jackson Black River
Heelsplitter Island Vernon Mississippi River
Heron Island Vernon Mississippi River <0.01 <0.026
High Bank Island Iowa Wisconsin River
High Island Dodge Beaver Dam Lake <0.01 <0.026
Hog Island Dane Lake Waubesa ? ?
Hog Island Juneau Unnamed marsh ? ?
Honey Island Marathon Honey Island Flowage
Honeymoon Island Barron Red Cedar Lake <0.01 <0.026
Horseshoe Island Iron Long Lake <0.01 <0.026
Hunter Island Crawford Mississippi River
Hunter Island Wood Wisconsin River ? ?
Hupf Island Dodge Beaver Dam Lake <0.01 <0.026
Hurricane Island Grant Mississippi River
Ile Le Grand Marinette Menominee River
Indernuhle Island Dodge Horicon Marsh
Island Number Fifty-four Buffalo Mississippi River