| Place Name | Henniker (town) |
| Place Type | Town |
| ZIP Code(s) | 03221 03229 03242 03244 03278 |
| County | Merrimack County |
| Area Code(s) | 603 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 5,671 |
| Majority Ethnicity | White 94.95% |
| Metro/Micro Stats Area | Concord, NH |
| US Congressional District(s) | New Hampshire 2nd |
| State House Districts | Merrimack 6 |
| State Senate Districts | 15 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 94.95% |
| African American | 1.55% |
| Hispanic | 0% |
| Asian | 0.5% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 3.01% |