| Official Name: | Garnavillo Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Iowa |
| Subdivision Type2: | County |
| Subdivision Name2: | Clayton |
| Area Total Km2: | 85.82 |
| Area Land Km2: | 85.82 |
| Area Water Km2: | 0 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 33.13 |
| Area Land Sq Mi: | 33.13 |
| Area Water Sq Mi: | 0 |
| Area Water Percent: | 0 |
| Population As Of: | 2000 |
| Population Total: | 1008 |
| Population Density Km2: | 11.7 |
| Population Density Sq Mi: | 30.4 |
| Elevation M: | 311 |
| Elevation Ft: | 1020 |
| Coordinates: | 42.8628°N -91.2319°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0467901 |
Garnavillo Township is a township in Clayton County, Iowa, United States. As of the 2000 census, its population was 1,008.
Garnavillo Township covers an area of 33.13sqmi and contains one incorporated settlement, Garnavillo. According to the USGS, it contains six cemeteries: Ceres, Garnavillo, Jenkins, McClelland, Saint Joseph and Saint Joseph.
The stream of West Branch South Cedar Creek runs through this township.