[3] The unincorporated community of Twig is in Grand Lake Township.

Grand Lake Township is in the unincorporated area of Saginaw.

The Cloquet River flows through the northern portion of Grand Lake Township.

The Ush-kab-wan River flows through the northeast part of the township near Taft.

The White Pine River briefly enters the south–central part of the township.

County Road 8 briefly enters the west–central part of Grand Lake Township, near its intersection with U.S. Highway 53.

17.1% of all households were made up of individuals, and 3.9% had someone living alone who was 65 years of age or older.