| Official Name: | Cass Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Clayton |
| Area Total Km2: | 95.09 |
| Area Land Km2: | 95.09 |
| Area Water Km2: | 0 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 36.72 |
| Area Land Sq Mi: | 36.72 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2000 |
| Population Total: | 1835 |
| Population Density Km2: | 19.3 |
| Population Density Sq Mi: | 50 |
| Elevation M: | 369 |
| Elevation Ft: | 1211 |
| Coordinates: | 42.6858°N -91.5464°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0467540 |
Cass Township is a township in Clayton County, Iowa, United States. As of the 2000 census, its population was 1,835.
Cass Township is named for Lewis Cass.[1]
Cass Township covers an area of 36.72sqmi and contains one incorporated settlement, Strawberry Point. According to the USGS, it contains three cemeteries: County Courners, Saint Mary's, and Strawberry Point Methodist.