| Official Name: | Union Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Madison |
| Government Type: | Indiana township |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 19.88 |
| Area Land Sq Mi: | 19.81 |
| Area Water Sq Mi: | 0.07 |
| Area Water Percent: | 0.35 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 8887 |
| Population Density Sq Mi: | 449.2 |
| Elevation M: | 277 |
| Elevation Ft: | 909 |
| Coordinates: | 40.0942°N -85.6053°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 46012, 46017, 47356 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0453923 |
Union Township is one of fourteen townships in Madison County, Indiana, United States. As of the 2010 census, its population was 8,898 and it contained 4,004 housing units.[2]
Union Township was organized in 1830. It was likely named in commemoration of the federal union of the United States.[3]
According to the 2010 census, the township has a total area of, of which (or 99.65%) is land and (or 0.35%) is water.[2]
The township contains these three cemeteries: Bronnenberg, Clem and Keesling.
Union Township residents may obtain a free library card from the Anderson Public Library in Anderson.[4]