| Official Name: | Jackson Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Spencer |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 20.49 |
| Area Land Sq Mi: | 20.25 |
| Area Water Sq Mi: | 0.24 |
| Population As Of: | 2020 |
| Population Total: | 803 |
| Population Density Sq Mi: | auto |
| Elevation Footnotes: | [1] |
| Elevation M: | 154 |
| Elevation Ft: | 505 |
| Coordinates: | 38.075°N -87.0483°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-37422[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453467 |
Jackson Township is one of nine townships in Spencer County, Indiana. As of the 2010 census, its population was 803 and it contained 353 housing units.[3] Jackson Township contains the city of Gentryville.
Jackson Township was organized in 1841, and named for Andrew Jackson (1767–1845), the 7th President of the United States.[4]
Colonel William Jones House was listed on the National Register of Historic Places in 1975.
According to the 2010 census, the township has a total area of, of which (or 98.83%) is land and (or 1.17%) is water.[5]