| Official Name: | Armstrong Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Vanderburgh |
| Government Type: | Indiana township |
| Area Total Sq Mi: | 29.52 |
| Area Land Sq Mi: | 29.48 |
| Area Water Sq Mi: | 0.04 |
| Area Water Percent: | 0.14 |
| Population As Of: | 2020 |
| Population Footnotes: | [1] |
| Population Total: | 1563 |
| Population Density Sq Mi: | 54.2 |
| Elevation M: | 136 |
| Elevation Ft: | 446 |
| Coordinates: | 38.1192°N -87.6464°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 47613, 47633, 47639, 47720, 47725 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 453091 |
Armstrong Township is one of eight townships in Vanderburgh County, Indiana, United States. As of the 2010 census, its population was 1,599 and it contained 634 housing units.[2]
Armstrong Township was established in 1818.[3]
According to the 2010 census, the township has a total area of, of which (or 99.86%) is land and (or 0.14%) is water.[2]