According to the United States Census Bureau, Green township had a total area of 16.256 square miles (42.104 km2), including 15.983 square miles (41.397 km2) of land and 0.273 square miles (0.707 km2) of water (1.68%) [REF].
Unincorporated communities, localities and place names located partially or completely within the township include Brighton Lakes, Buckmire Pond, Greendell, Huntsburg, Huntsville, Lincoln, Tranquility, Whitehall and Yellow Frame [REF].