Grand Island Township is a civil township of Alger County in the U.S. state of Michigan.

Located along the shores of Lake Superior, the township includes Grand Island, which is designated as the Grand Island National Recreation Area. The township also includes a small portion of the nearby mainland where most of its residents reside along M-28 just north of the city of Munising. At the 2020 census, the township population was 35, which ranked Grand Island Township as the second-least populated municipality in the state after Pointe Aux Barques Township.

Geography

According to the United States Census Bureau, the township has a total area of , of which is land and , or 54.21%, is water.

Communities

  • Williams Landing is an unincorporated community in the mainland portion of the township at Center Road and Murray Bay.

Climate

This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. According to the Köppen Climate Classification system, Grand Island has a humid continental climate, abbreviated "Dfb" on climate maps.

Demographics

As of the census