| Official Name: | Harrison Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Clay |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 62.67 |
| Area Land Sq Mi: | 62.24 |
| Area Water Sq Mi: | 0.43 |
| Population As Of: | 2020 |
| Population Total: | 2151 |
| Population Density Sq Mi: | auto |
| Elevation Footnotes: | [1] |
| Elevation M: | 184 |
| Elevation Ft: | 604 |
| Coordinates: | 39.2694°N -87.1103°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-31684[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453381 |
Harrison Township is one of eleven townships in Clay County, Indiana. As of the 2020 census, its population was 2,151 (slightly down from 2,172 at 2010[3]) and it contained 1,025 housing units.[4]
The Feeder Dam Bridge and Tide Water Pumping Station are listed on the National Register of Historic Places.
According to the 2010 census, the township has a total area of, of which (or 99.31%) is land and (or 0.69%) is water.[3]
(This list is based on USGS data and may include former settlements.)
The township contains nine cemeteries: Cole, Duncan, Goshorn Memorial Park, Greenwell, Liechty, Maple Grove, Maple Grove, Sink and Wilson.