| Official Name: | Union Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Whitley |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 36.99 |
| Area Land Sq Mi: | 36.95 |
| Area Water Sq Mi: | 0.04 |
| Area Water Percent: | 0.11 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 2625 |
| Population Density Sq Mi: | 60.7 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Footnotes: | [2] |
| Elevation M: | 254 |
| Elevation Ft: | 833 |
| Coordinates: | 41.1331°N -85.3956°W |
| Area Code: | 260 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 453940 |
Union Township is one of nine townships in Whitley County, Indiana, United States. As of the 2020 census, its population was 2,625 (up from 2,244 at 2010[3]) and it contained 1,144 housing units.
According to the 2010 census, the township has a total area of, of which (or 99.89%) is land and (or 0.11%) is water.[3] The stream of Emerick Branch runs through this township.
(This list is based on USGS data and may include former settlements.)
The township contains three cemeteries, Coesse Hope Lutheran Cemetery (NE corner of US 30 and 500 E) Wigent-Taylor cemetery (east of 600E on Old Trail Road) and Eel River Presbyterian cemetery on Lincoln Way just east of 600 E.