| Place Name | Waterloo (Jefferson County) |
| Place Type | Town |
| ZIP Code(s) | 53094 53551 53559 53594 |
| County | Jefferson County |
| Area Code(s) | 274,920 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 939 |
| Majority Ethnicity | White 95.7% |
| Metro/Micro Stats Area | Watertown-Fort Atkinson, WI |
| US Congressional District(s) | Wisconsin 5th |
| State Assembly Districts | 38 |
| State Senate Districts | 13 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.7% |
| African American | 0.65% |
| Hispanic | 0% |
| Asian | 2.37% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.29% |