| Place Name | Rock Township (Woodbury County) |
| Place Type | Township |
| ZIP Code(s) | 51016 51018 51025 |
| County | Woodbury County |
| Area Code(s) | 712 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 860 |
| Majority Ethnicity | White 79.47% |
| Metro/Micro Stats Area | Sioux City, IA-NE-SD |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 17 |
| State Senate Districts | 9 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 79.47% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 20.53% |