| Place Name | Lake Mills |
| Place Type | City |
| ZIP Code(s) | 53551 |
| County | Jefferson County |
| Area Code(s) | 274,920 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 5,695 |
| Population Growth Rate (2010-19) | 8.81% |
| Majority Ethnicity | White 87.72% |
| 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 | 87.72% |
| African American | 0.21% |
| Hispanic | 0% |
| Asian | 1.11% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 10.96% |