| Place Name | Centennial Township |
| Place Type | Township |
| ZIP Code(s) | 51240 51241 57013 |
| County | Lyon County |
| Area Code(s) | 712 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 315 |
| Majority Ethnicity | White 95.87% |
| US Congressional District(s) | Iowa 4th |
| State House Districts | 1 |
| State Senate Districts | 1 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.87% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.13% |