| 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: | Delaware |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 29.65 |
| Area Land Sq Mi: | 29.34 |
| Area Water Sq Mi: | 0.3 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 2540 |
| Population Density Sq Mi: | 96.7 |
| Elevation Footnotes: | [2] |
| Elevation M: | 274 |
| Elevation Ft: | 899 |
| Coordinates: | 40.3481°N -85.3842°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-77246[3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453913 |
Union Township is one of twelve townships in Delaware County, Indiana. According to the 2010 census, its population was 2,838 and it contained 1,260 housing units.[4]
Felt's Farm and the Mount Zion Methodist Episcopal Church are listed on the National Register of Historic Places.
According to the 2010 census, the township has a total area of, of which (or 98.95%) is land and (or 1.01%) is water.[4]
(This list is based on USGS data and may include former settlements.)
The township contains three cemeteries: Leaird, Mount Zion Church and Union.