| Place Name | Hennepin Township |
| Place Type | Township |
| ZIP Code(s) | 61326 61327 61335 61560 |
| County | Putnam County |
| Area Code(s) | 815,779 |
| Timezone | Central Standard Time (CST) |
| Population (2021) | 1,550 |
| Majority Ethnicity | White 92.71% |
| Metro/Micro Stats Area | Ottawa, IL |
| US Congressional District(s) | Illinois 16th |
| State House Districts | 76 |
| State Senate Districts | 38 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 92.71% |
| African American | 0.76% |
| Hispanic | 0% |
| Asian | 1.08% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.45% |