| Place Name | Hazleton Township |
| Place Type | Township |
| ZIP Code(s) | 50641 50644 50662 |
| County | Buchanan County |
| Area Code(s) | 319 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 1,016 |
| Majority Ethnicity | White 97.38% |
| US Congressional District(s) | Iowa 1st |
| State House Districts | 64 |
| State Senate Districts | 32 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.38% |
| African American | 0.73% |
| Hispanic | 0.31% |
| Asian | 0.42% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.15% |