| Place Name | Waltham |
| Place Type | City |
| ZIP Code(s) | 55982 |
| County | Mower County |
| Area Code(s) | 507 |
| Timezone | Central Daylight Time (CDT) |
| Population (2022) | 141 |
| Population Growth Rate (2010-19) | 8.61% |
| Majority Ethnicity | White 84.69% |
| Metro/Micro Stats Area | Austin, MN |
| US Congressional District(s) | Minnesota 1st |
| State House Districts | 27B |
| State Senate Districts | 27 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 84.69% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 15.31% |