| Official Name: | Pettis Township, Missouri |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Missouri |
| Subdivision Type2: | County |
| Subdivision Name2: | Adair |
| Area Total Km2: | 146.19 |
| Area Land Km2: | 145.69 |
| Area Water Km2: | 0.50 |
| Area Water Percent: | 0.34 |
| Population As Of: | 2010 |
| Population Total: | 795 |
| Population Density Km2: | 5.5 |
| Elevation Footnotes: | [1] |
| Elevation M: | 294 |
| Elevation Ft: | 965 |
| Coordinates: | 40.0869°N -92.5847°W |
| Blank Name: | FIPS code |
| Blank Info: | 29-57224[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0766215 |
Pettis Township is one of ten townships in Adair County, Missouri, United States. As of the 2010 census, its population was 795.[3] It is named for former US Congressman Spencer Pettis, who represented Missouri from 1829 to 1831 until being killed in a duel.[4]
Pettis Township covers an area of 146.2km2 and contains one incorporated settlement, Millard. It contains seven cemeteries: Bragg, Canaday, Indian Hill, Indian Hill (historical), Shaver, Shoemaker and Stukey.
The streams of Elm Creek, Goose Creek, Hog Creek, Indian Creek, Sugar Creek and Turkey Run run through this township.
Pettis Township contains one airport, Kirksville Regional Airport.
U.S. Highway 63 passes through the township.