| Official Name: | Troy Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Fountain |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 44.44 |
| Area Land Sq Mi: | 43.86 |
| Area Water Sq Mi: | 0.58 |
| Population As Of: | 2020 |
| Population Total: | 3735 |
| Population Density Sq Mi: | auto |
| Elevation Footnotes: | [1] |
| Elevation M: | 198 |
| Elevation Ft: | 650 |
| Coordinates: | 40.1569°N -87.35°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-76616[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453902 |
Troy Township is one of eleven townships in Fountain County, Indiana. As of the 2020 census, its population was 3,735 and it contained 1,674 housing units.[3]
Troy Township lies along the western side of Fountain County; the Wabash River defines the western borders of both. According to the 2010 census, the township has a total area of, of which (or 98.69%) is land and (or 1.31%) is water.[4]
Troy Township contains the Fountain County seat of Covington, in the western part of the county near the river. At one time, the unincorporated community of Layton existed in the southeast part of the township along the present route of U.S. Route 136.
Interstate 74 passes through the southern part of the township. U.S. Route 136 lies to the north of I-74 for most of its route; it passes through Covington, but east of Layton, I-74 crosses to its north side.
The township contains the four cemeteries of Bend, Mount Hope, Prescott Grove and Sand Hill.