| Place Name | Jefferson Township (Fayette County) |
| Place Type | Township |
| ZIP Code(s) | 50662 50671 |
| County | Fayette County |
| Area Code(s) | 319,563 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 6,328 |
| Majority Ethnicity | White 95.71% |
| US Congressional District(s) | Iowa 1st |
| State House Districts | 64 |
| State Senate Districts | 32 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.71% |
| African American | 1.41% |
| Hispanic | 0.45% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.42% |