| Official Name: | Washington Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Boone |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 35.58 |
| Area Land Sq Mi: | 35.44 |
| Area Water Sq Mi: | 0.14 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 1399 |
| Population Density Sq Mi: | 39.4 |
| Elevation Footnotes: | [2] |
| Elevation M: | 271 |
| Elevation Ft: | 889 |
| Coordinates: | 40.1311°N -86.5267°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-80378[3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453983 |
Washington Township is one of twelve townships in Boone County, Indiana. As of the 2010 census, its population was 1,398 and it contained 547 housing units.[4]
According to the 2010 census, the township has a total area of, of which (or 99.61%) is land and (or 0.39%) is water.[4]
The township contains three cemeteries: Bethel, Bethel Hill and Brush Creek.