| Official Name: | Jefferson Township |
| Settlement Type: | Township |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Fayette |
| Area Total Km2: | 94.42 |
| Area Land Km2: | 94.2 |
| Area Water Km2: | 0.22 |
| Unit Pref: | Imperial |
| Area Total Sq Mi: | 36.46 |
| Area Land Sq Mi: | 36.37 |
| Area Water Sq Mi: | 0.09 |
| Area Water Percent: | 0.23 |
| Population As Of: | 2010 |
| Population Total: | 6910 |
| Population Density Km2: | auto |
| Elevation M: | 337 |
| Elevation Ft: | 1106 |
| Coordinates: | 42.6864°N -91.9031°W |
| Timezone: | CST |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Postal Code Type: | ZIP codes |
| Postal Code: | 50655, 50662, 50671 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 0468134 |
Jefferson Township is one of twenty townships in Fayette County, Iowa, USA. As of the 2010 census, its population was 6,910.[1]
According to the United States Census Bureau, Jefferson Township covers an area of 36.46 square miles (94.42 square kilometers); of this, 36.37 square miles (94.2 square kilometers, 99.77 percent) is land and 0.09 square miles (0.22 square kilometers, 0.23 percent) is water.
The township contains these three cemeteries: Oakdale, Otsego and Woodlawn.