| Official Name: | Union Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Missouri |
| Subdivision Type2: | County |
| Subdivision Name2: | Barton |
| Area Total Km2: | 93.7 |
| Area Land Km2: | 93.41 |
| Area Water Km2: | 0.29 |
| Area Total Sq Mi: | 36.18 |
| Area Land Sq Mi: | 36.06 |
| Area Water Sq Mi: | 0.11 |
| Area Water Percent: | 0.31 |
| Population As Of: | 2000 |
| Population Total: | 347 |
| Population Density Km2: | 3.7 |
| Population Density Sq Mi: | 9.6 |
| Elevation M: | 289 |
| Elevation Ft: | 948 |
| Coordinates: | 37.5858°N -94.2919°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0766288 |
Union Township is one of fifteen townships in Barton County, Missouri, USA. As of the 2000 census, its population was 347.
Union Township was formed by means of merger, or "union" of existing townships, hence the name.[1]
Union Township covers an area of 36.18sqmi and contains no incorporated settlements. According to the USGS, it contains one cemetery, Bakers Grove.
The streams of Bucks Run Creek, Little Creek and Moores Branch run through this township.