| Official Name: | Pierson Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Vigo |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 36 |
| Area Land Sq Mi: | 35.35 |
| Area Water Sq Mi: | 0.65 |
| Area Water Percent: | 1.81 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 1251 |
| Population Density Sq Mi: | 34.2 |
| Elevation M: | 180 |
| Elevation Ft: | 591 |
| Coordinates: | 39.3031°N -87.2931°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 47802, 47850, 47858, 47866 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 453731 |
Pierson Township is one of twelve townships in Vigo County, Indiana, United States. At the 2010 census, the population was 1,210 and it contained 589 housing units.[2]
Frank Senour Round Barn was listed on the National Register of Historic Places in 1993.
According to the 2010 census, the township has a total area of, of which (or 98.19%) is land and (or 1.81%) is water.[2]
The township contains these six cemeteries: Armstrong, Brown, Donham, Ruggles, Stephens and Taylor.