| 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: | Fulton |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 40.96 |
| Area Land Sq Mi: | 40.55 |
| Area Water Sq Mi: | 0.4 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 1259 |
| Population Density Sq Mi: | 34.4 |
| Elevation Footnotes: | [2] |
| Elevation M: | 239 |
| Elevation Ft: | 784 |
| Coordinates: | 41.0361°N -86.3981°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-77282[3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453915 |
Union Township is one of eight townships in Fulton County, Indiana. As of the 2020 census, its population was 1,259 (down from 1,397 at 2010[4]) and it contained 691 housing units.
According to the 2010 census, the township has a total area of, of which (or 99.00%) is land and (or 0.98%) is water.[4]
(This list is based on USGS data and may include former settlements.)
The township contains four cemeteries: Barnett, Bruce Lake, Independent Order of Odd Fellows and Shaffer.