| Official Name: | Posey Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Harrison |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 39.67 |
| Area Land Sq Mi: | 39.67 |
| Area Water Sq Mi: | 0 |
| Population As Of: | 2020 |
| Population Total: | 2830 |
| Population Density Sq Mi: | auto |
| Elevation Footnotes: | [1] |
| Elevation M: | 238 |
| Elevation Ft: | 781 |
| Coordinates: | 38.1322°N -85.9561°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-61344[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453764 |
Posey Township is one of twelve townships in Harrison County, Indiana. As of the 2020 census, its population was 2,830 and it contained 1,205 housing units.[3]
Posey township was named for Territorial Governor Thomas Posey.
The first settlers entered Posey Township in 1807. There were David and [4] Joshua Farnsley in the north central part, Jacob Lutz and William Smith in the southeast along the Ohio, and General W. Johnson in the southwest, near present-day Rogers Campground.[5]
Elizabeth was platted in 1812 making it the second oldest town in the county.
In 1998, Caesars Southern Indiana opened in Posey township near Bridgeport.
According to the 2010 census, the township has a total area of, all land.[6]