| Place Name | Jefferson Township (Dubuque County) |
| Place Type | Township |
| ZIP Code(s) | 52039 52053 52073 |
| County | Dubuque County |
| Area Code(s) | 563 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 1,114 |
| Majority Ethnicity | White 97.84% |
| Metro/Micro Stats Area | Dubuque, IA |
| US Congressional District(s) | Iowa 1st |
| State House Districts | 57 |
| State Senate Districts | 29 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.84% |
| African American | 0.18% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.98% |