| 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: | Bollinger |
| Area Total Km2: | 147.61 |
| Area Land Km2: | 147.53 |
| Area Water Km2: | 0.08 |
| Area Total Sq Mi: | 56.99 |
| Area Land Sq Mi: | 56.96 |
| Area Water Sq Mi: | 0.03 |
| Area Water Percent: | 0.05 |
| Population As Of: | 2010 |
| Population Total: | 1058 |
| Population Density Km2: | 39.07 |
| Population Density Sq Mi: | 24.28 |
| Elevation Footnotes: | [1] |
| Elevation M: | 217 |
| Elevation Ft: | 712 |
| Coordinates: | 37.5472°N -90.0639°W |
| Blank Name: | FIPS code |
| Blank Info: | 29-74518[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0766326 |
Union Township is one of eight townships in Bollinger County, Missouri, USA. As of the 2000 U.S. Census, its population was 1,035. As of the 2010 U.S. Census, the population had increased to 1,058. Union Township covers an area of 56.99sqmi.
Union Township was established in 1848.[3]
As of the 2010 U.S. Census, there were 1,058 people living in the township. The population density was 24.28sp=usNaNsp=us. There were 497 housing units in the township. The racial makeup of the township was 96.03% White, 1.70% Black or African American, 0.57% Native American, 0.19% Asian, 0.19% from other races, and 1.32% from two or more races. Approximately 0.28% of the population were Hispanic or Latino of any race.
The township contains no incorporated settlements.
The township contains the unincorporated areas and historical communities of Alliance, Hurricane, North Patton, Patton, and Patton Junction.
The township contains two cemeteries: Johnson and Pleasant Hill.
The streams of Baltimore Creek, Blue Creek, Buck Creek, Cape Creek, Conrad Creek, Goose Creek, Grounds Creek, Little Whitewater Creek, and Stannett Creek flow through Union Township. Other bodies of water located in the township include the Whitewater River, Destitute Acres Lake, Fulton Lake, and Grindstaff Lake.