Cascade Township is one of seventeen townships in Dubuque County, Iowa, United States.

As of the 2000 census, its population was 1,079.

[1] The name of Cascade Township is derived from the cascade, or water power, with which early settlers powered their mills.

[2] According to the United States Census Bureau, Cascade Township covers an area of 35.78 square miles (92.68 square kilometers).

The township contains these five cemeteries: Cascade Protestant, Johns Creek, Saint Martins Catholic, Saint Marys Catholic and Zion Reform.