| 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: | Clinton |
| Government Type: | Indiana township |
| Established Title: | Organized |
| Established Date: | 1889 |
| Area Total Sq Mi: | 19.91 |
| Area Land Sq Mi: | 19.8 |
| Area Water Sq Mi: | 0.11 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 940 |
| Population Density Sq Mi: | auto |
| Elevation Footnotes: | [2] |
| Elevation M: | 255 |
| Elevation Ft: | 837 |
| Coordinates: | 40.3247°N -86.5133°W |
| Blank Name: | FIPS code |
| Blank Info: | 18-77192[3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 453910 |
Union Township is one of fourteen townships in Clinton County, Indiana, United States. As of the 2020 census, its population was 940 (down from 973 at 2010[4]) and it contained 405 housing units.The township's name refers to its creation from the northern part of Center Township and the southern part of Owen.[5]
Current Address of Union Township: 1750 E Garnett Dr. Frankfort, IN 46041
Current Phone Number of Union Township: 765-357-0390
Organized in 1889, Union was the last of Clinton County's townships to be created. It was formed as the result of dissatisfaction among the residents of northern Center Township with "a tax donation made to secure the Clover Leaf shops at Frankfort."[6]
According to the 2010 census, the township has a total area of, of which (or 99.45%) is land and (or 0.55%) is water.[4]
Cemeteries: