| Place Name | Rock Township (Sioux County) |
| Place Type | Township |
| ZIP Code(s) | 51235 51239 51247 |
| County | Sioux County |
| Area Code(s) | 712 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 4,573 |
| Majority Ethnicity | White 77.19% |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 4 |
| State Senate Districts | 2 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 77.19% |
| African American | 0.08% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 22.73% |