| Place Name | Henniker |
| Place Type | Census Designated Place |
| ZIP Code(s) | 03242 |
| County | Merrimack County |
| Area Code(s) | 603 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 1,734 |
| Population Growth Rate (2010-19) | 81.22% |
| Majority Ethnicity | White 90.12% |
| 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 | 90.12% |
| African American | 3.17% |
| Hispanic | 0% |
| Asian | 1.03% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 5.67% |