Green Township is one of thirteen townships in Fremont County, Iowa, United States. As of the 2010 census, its population was 281 and it contained 122 housing units.
As of the 2010 census, Green Township covered an area of ; of this, (99.95 percent) was land and (0.05 percent) was water.
The township contains Dawsonburg Cemetery, Mount Zion Cemetery, Penny Cemetery, Rhodes Cemetery and Ross Cemetery.