| Official Name: | Harrison Township, Adair County |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Adair |
| Area Total Km2: | 92.9 |
| Area Land Km2: | 92.83 |
| Area Water Km2: | 0.08 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 35.87 |
| Area Land Sq Mi: | 35.84 |
| Area Water Sq Mi: | 0.03 |
| Population As Of: | 2010 |
| Population Total: | 178 |
| Population Density Km2: | 1.9 |
| Population Density Sq Mi: | 5.0 |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Footnotes: | [1] |
| Elevation M: | 349 |
| Elevation Ft: | 1145 |
| Coordinates: | 41.3747°N -94.2981°W |
| Blank Name: | FIPS code |
| Blank Info: | 19-91854[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0468009 |
Harrison Township is one of seventeen townships in Adair County, Iowa, USA. As of the 2020 census, its population was 178.[3]
Harrison Township was organized in 1856.[4] It was served by the Arbor Hill post office (41.3667°N -94.3183°W) from 1857 to 1907.[5] [6]
Harrison Township covers an area of 35.87sqmi and contains no incorporated settlements. According to the USGS, it contains two cemeteries: Fairview and Roberts.