Marion Township is one of sixteen townships in Franklin County, Iowa, United States.

As of the 2010 census, its population was 1,030 and it contained 464 housing units.

[3] As of the 2010 census, Marion Township covered an area of 36.6 square miles (95 km2); of this, 36.56 square miles (94.7 km2) (99.91 percent) was land and 0.03 square miles (0.078 km2) (0.09 percent) was water.

[1] (This list is based on USGS data and may include former settlements.)

The township contains Coulter Cemetery,[4] Marion Center Cemetery[5] and Saint Pauls Evangelical Lutheran Cemetery.