| Official Name: | Marion Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Missouri |
| Subdivision Type2: | County |
| Subdivision Name2: | Buchanan |
| Area Total Km2: | 125 |
| Area Land Km2: | 124.87 |
| Area Water Km2: | 0.13 |
| Area Total Sq Mi: | 48.26 |
| Area Land Sq Mi: | 48.21 |
| Area Water Sq Mi: | 0.05 |
| Area Water Percent: | 0.1 |
| Population As Of: | 2010 |
| Population Total: | 1178 |
| Population Density Km2: | 9.8 |
| Population Density Sq Mi: | 25.4 |
| Elevation Footnotes: | [1] |
| Elevation M: | 258 |
| Elevation Ft: | 846 |
| Coordinates: | 39.7647°N -94.6556°W |
| Blank Name: | FIPS code |
| Blank Info: | 29-45938[2] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0766342 |
Marion Township is one of twelve townships in Buchanan County, Missouri, USA. As of the 2010 census, its population was 1,178.[3]
Marion Township was established in 1837.[4]
Marion Township covers an area of 48.26sqmi and contains one incorporated settlement, Easton. It contains eight cemeteries: Blakely, Bowen, Courtney, Kessler, Minor, Moxley, Saint Josephs and Saint Marys.
The streams of Becks Branch, James Branch, Little Third Fork, Muddy Creek, One Hundred and Two River and Third Fork run through this township.