| 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: | Brown |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 102 |
| Area Land Sq Mi: | 99.42 |
| Area Water Sq Mi: | 2.58 |
| Population As Of: | 2020 |
| Population Total: | 5164 |
| Population Density Sq Mi: | auto |
| Elevation Footnotes: | [1] |
| Elevation M: | 230 |
| Elevation Ft: | 755 |
| Coordinates: | 39.1675°N -86.2633°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-80396[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453984 |
Washington Township is one of four townships in Brown County, Indiana. As of the 2020 census, its population was 5,164 and it contained 2,753 housing units.[3] The township includes the northern portion of Brown County State Park.
Washington Township was established in 1836.[4]
The Brown County Bridge No. 36 and Theodore Clement Steele House and Studio are listed on the National Register of Historic Places.
According to the 2010 census, the township has a total area of, of which (or 97.47%) is land and (or 2.53%) is water.[5] Axsom Branch Pond and Terrill Ridge Pond are in this township.
(This list is based on USGS data and may include former settlements.)
The township contains eight cemeteries: Clark, Crouch, David, Dobbs, Hickory Hill, Marlett, Pittman, South View, and Terrill.