| Official Name: | Clay Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | LaGrange |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 36.2 |
| Area Land Sq Mi: | 36.14 |
| Area Water Sq Mi: | 0.05 |
| Population As Of: | 2020 |
| Population Total: | 3823 |
| Population Density Sq Mi: | auto |
| Elevation Footnotes: | [1] |
| Elevation M: | 280 |
| Elevation Ft: | 919 |
| Coordinates: | 41.6511°N -85.4781°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-13132[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453213 |
Clay Township is one of eleven townships in LaGrange County, Indiana. As of the 2020 census, its population was 3,823, up from 3,424 at the previous census.[3]
According to the 2020 "ACS 5-Year Estimates Data Profiles", 24.4% of the township's population spoke only English, while 70.6 spoke an "other [than Spanish] Indo-European language" (basically Pennsylvania German/German).
According to the 2010 census, the township has a total area of, of which (or 99.83%) is land and (or 0.14%) is water.[3]