| Official Name: | Millgrove Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Steuben |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 23.74 |
| Area Land Sq Mi: | 22.03 |
| Area Water Sq Mi: | 1.71 |
| Area Water Percent: | 7.20 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 1619 |
| Population Density Sq Mi: | 71.6 |
| Elevation Footnotes: | [2] |
| Elevation M: | 291 |
| Elevation Ft: | 955 |
| Coordinates: | 41.7347°N -85.1367°W |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Area Code: | 260 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 453629 |
Millgrove Township is one of twelve townships in Steuben County, Indiana, United States. As of the 2020 census, its population was 1,619, up from 1,577 at 2010,[3] and it contained 960 housing units.
Fawn River State Fish Hatchery was listed on the National Register of Historic Places in 1997.
According to the 2010 census, the township has a total area of, of which (or 92.80%) is land and (or 7.20%) is water. Lakes in this township include Bell Lake, Brown Lake, Chair Factory Lake, Lake Gage, Lake Syl-van, Lime Lake, Lime Lake, Perch Lake, Rhodes Lake, Sally Owen Lake, Tamarack Lake and Warner Lake. The stream of Crooked Creek runs through this township.
(This list is based on USGS data and may include former settlements.)
The township contains three cemeteries: Carlton, Greenlawn and Mill Grove.