| Place Name | Rock Township (Lyon County) |
| Place Type | Township |
| ZIP Code(s) | 51246 |
| County | Lyon County |
| Area Code(s) | 712 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 2,919 |
| Majority Ethnicity | White 94.91% |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 1 |
| State Senate Districts | 1 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 94.91% |
| African American | 0.24% |
| Hispanic | 0.1% |
| Asian | 0.9% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.85% |