| 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: | Shelby |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 26.83 |
| Area Land Sq Mi: | 26.76 |
| Area Water Sq Mi: | 0.07 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 920 |
| Population Density Sq Mi: | 36.3 |
| Elevation Footnotes: | [2] |
| Elevation M: | 269 |
| Elevation Ft: | 883 |
| Coordinates: | 39.5781°N -85.6697°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-77642[3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453934 |
Union Township is one of fourteen townships in Shelby County, Indiana. As of the 2010 census, its population was 970 and it contained 395 housing units.[4]
Union Township was organized in 1822 and reorganized with its present borders in 1840.[5]
According to the 2010 census, the township has a total area of, of which (or 99.74%) is land and (or 0.26%) is water.[4]