| Official Name: | Marion Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Jennings |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 33.02 |
| Area Land Sq Mi: | 32.99 |
| Area Water Sq Mi: | 0.04 |
| Area Water Percent: | 0.12 |
| Population As Of: | 2020 |
| Population Total: | 1117 |
| Population Density Sq Mi: | auto |
| Elevation M: | 179 |
| Elevation Ft: | 587 |
| Coordinates: | 38.8525°N -85.7494°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0453608 |
Marion Township is one of eleven townships in Jennings County, Indiana, United States. As of the 2020 census, its population was 1,117 (representing no change from 2010[1]) and it contained 461 housing units.[2]
According to the 2010 census, the township has a total area of, of which (or 99.91%) is land and (or 0.12%) is water.[1] The streams of Brushy Fork, Crooked Creek, Sixmile Creek and Slate Creek run through this township.
The township contains two cemeteries: German and Keith.