| Official Name: | Union Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Delaware |
| Area Total Km2: | 77.2 |
| Area Land Km2: | 77.19 |
| Area Water Km2: | 0.02 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 29.81 |
| Area Land Sq Mi: | 29.8 |
| Area Water Sq Mi: | 0.01 |
| Area Water Percent: | 0.03 |
| Population As Of: | 2000 |
| Population Total: | 292 |
| Population Density Km2: | 3.8 |
| Population Density Sq Mi: | 9.8 |
| Elevation M: | 275 |
| Elevation Ft: | 902 |
| Coordinates: | 42.3431°N -91.3153°W |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0468818 |
Union Township is a township in Delaware County, Iowa, United States. As of the 2000 census, its population was 292.[1]
Union Township covers an area of 29.81 square miles (77.2 square kilometers); of this, 0.01 square miles (0.02 square kilometers) or 0.03 percent is water. The streams of Buck Creek, Lime Creek and Plum Creek run through this township.
(This list is based on USGS data and may include former settlements.)
https://pubs.lib.uiowa.edu/annals-of-iowa/article/11033/galley/119590/view/
The township contains two cemeteries: Buck Creek and Grove Creek.