| Official Name: | Union Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Nebraska |
| Subdivision Type2: | County |
| Subdivision Name2: | Knox |
| Area Total Km2: | 90.56 |
| Area Land Km2: | 89.77 |
| Area Water Km2: | 0.79 |
| Area Total Sq Mi: | 34.97 |
| Area Land Sq Mi: | 34.66 |
| Area Water Sq Mi: | 0.31 |
| Area Water Percent: | 0.87 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 74 |
| Population Density Km2: | auto |
| Elevation M: | 446 |
| Elevation Ft: | 1463 |
| Coordinates: | 42.7372°N -97.8944°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0838298 |
Union Township is one of thirty townships in Knox County, Nebraska, United States. The population was 74 at the 2020 census.[1] A 2023 estimate placed the township's population at 75.[1]