| Official Name: | Polk Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Marshall |
| Government Type: | Indiana township |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 42.24 |
| Area Land Sq Mi: | 42.09 |
| Area Water Sq Mi: | 0.16 |
| Area Water Percent: | 0.38 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 2781 |
| Population Density Sq Mi: | 67.1 |
| Elevation M: | 225 |
| Elevation Ft: | 738 |
| Coordinates: | 41.4289°N -86.4108°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 46563, 46574 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0453755 |
Polk Township is one of ten townships in Marshall County, Indiana, United States. As of the 2020 census, its population was 2,781 (down from 2,824 at 2010[2]) and it contained 1,170 housing units.
Polk Township was organized on March 4, 1845. The date of the township's organization coincided with the inauguration of James K. Polk, hence the name.[3]
The Polk Township District No. 2 School was listed on the National Register of Historic Places in 2013.[4]
According to the 2010 census, the township has a total area of, of which (or 99.64%) is land and (or 0.38%) is water.[2]
The township contains Barber Cemetery Blissville Cemetery and Tyner Cemetery.