| Place Name | Jefferson Township (Butler County) |
| Place Type | Township |
| ZIP Code(s) | 50602 50619 50665 50670 |
| County | Butler County |
| Area Code(s) | 319 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 270 |
| Majority Ethnicity | White 92.58% |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 50 |
| State Senate Districts | 25 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 92.58% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 7.42% |