| 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: | Shelby |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 24.95 |
| Area Land Sq Mi: | 24.82 |
| Area Water Sq Mi: | 0.12 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 1935 |
| Population Density Sq Mi: | 77.5 |
| Elevation Footnotes: | [2] |
| Elevation M: | 241 |
| Elevation Ft: | 791 |
| Coordinates: | 39.5914°N -85.755°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-47052[3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453613 |
Marion Township is one of fourteen townships in Shelby County, Indiana. As of the 2010 census, its population was 1,923 and it contained 867 housing units.[4]
Marion Township was named for Francis Marion, an army officer during the American Revolutionary War, known as the Swamp Fox.[5]
According to the 2010 census, the township has a total area of, of which (or 99.48%) is land and (or 0.48%) is water.[4]