| Official Name: | Grant Township, Cerro Gordo County |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Cerro Gordo |
| Area Total Km2: | 91.81 |
| Area Land Km2: | 91.58 |
| Area Water Km2: | 0.22 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 35.45 |
| Area Land Sq Mi: | 35.36 |
| Area Water Sq Mi: | 0.09 |
| Population As Of: | 2000 |
| Population Total: | 354 |
| Population Density Km2: | 3.9 |
| Population Density Sq Mi: | 10 |
| Elevation Footnotes: | [1] |
| Elevation M: | 383 |
| Elevation Ft: | 1257 |
| Coordinates: | 43.2208°N -93.4481°W |
| Blank Name: | FIPS code |
| Blank Info: | 19-91641[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0467934 |
Grant Township is one of 16 townships in Cerro Gordo County, Iowa, United States. As of the 2000 census, its population was 354.
Grant Township was the site of the airplane crash north of the city of Clear Lake, in which rock and roll stars Buddy Holly, Ritchie Valens, and J.P. "The Big Bopper" Richardson, along with their pilot Roger A. Peterson, were killed on February 3, 1959. The site is located in the extreme eastern part of the township, near its border with Lincoln Township.
Grant Township covers an area of 35.45sqmi and contains no incorporated settlements. According to the USGS, it contains one cemetery, Grant. The city of Fertile borders it to the north.