| Official Name: | Otter Creek Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Vigo |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 35.61 |
| Area Land Sq Mi: | 35.24 |
| Area Water Sq Mi: | 0.37 |
| Area Water Percent: | 1.04 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 9012 |
| Population Density Sq Mi: | 257.3 |
| Elevation M: | 155 |
| Elevation Ft: | 509 |
| Coordinates: | 39.5619°N -87.3481°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 47805, 47874 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 453699 |
Otter Creek Township is one of twelve townships in Vigo County, Indiana, United States. As of the 2010 census, its population was 9,069 and it contained 3,917 housing units.[2]
Markle House and Mill Site was listed on the National Register of Historic Places in 1979.
According to the 2010 census, the township has a total area of, of which (or 98.96%) is land and (or 1.04%) is water.[2]
The township contains ten cemeteries: Denny, Evans, Haven, Kennedy, Markles, Phillips, Roselawn Memorial Park, Steveson, Stewart and Wood.