| Place Name | Sumner (Jefferson County) |
| Place Type | Town |
| ZIP Code(s) | 53523 53534 53538 53563 |
| County | Jefferson County |
| Area Code(s) | 274,920,608 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 718 |
| Majority Ethnicity | White 95.97% |
| Metro/Micro Stats Area | Watertown-Fort Atkinson, WI |
| US Congressional District(s) | Wisconsin 5th |
| State Assembly Districts | 43 |
| State Senate Districts | 15 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.97% |
| African American | 1.29% |
| Hispanic | 0% |
| Asian | 1.29% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.44% |