| Place Name | Rock Lake Township |
| Place Type | Township |
| ZIP Code(s) | 56115 |
| County | Lyon County |
| Area Code(s) | 507 |
| Timezone | Central Daylight Time (CDT) |
| Population (2021) | 308 |
| Majority Ethnicity | White 97.12% |
| Metro/Micro Stats Area | Marshall, MN |
| US Congressional District(s) | Minnesota 7th |
| State House Districts | 22A |
| State Senate Districts | 22 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.12% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.88% |