| Official Name: | Jefferson Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Sullivan |
| Government Type: | Indiana township |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 42.95 |
| Area Land Sq Mi: | 42.42 |
| Area Water Sq Mi: | 0.53 |
| Area Water Percent: | 1.23 |
| Population As Of: | 2020 |
| Population Total: | 355 |
| Population Density Sq Mi: | auto |
| Elevation M: | 190 |
| Elevation Ft: | 623 |
| Coordinates: | 38.9619°N -87.2886°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 47528, 47838, 47848, 47882 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 453498 |
Jefferson Township is one of nine townships in Sullivan County, Indiana, United States. At the 2020 census, its population was 355 and it contained 218 housing units.[1]
According to the 2010 census, the township has a total area of, of which (or 98.77%) is land and (or 1.23%) is water.[2]
(This list is based on USGS data and may include former settlements.)
The township contains six cemeteries: Hale, McDade, Pirtle, Posey, Smith and Woodward.