| Place Name | Northfield |
| Place Type | Town |
| ZIP Code(s) | 03220 03224 03235 03276 03303 |
| County | Merrimack County |
| Area Code(s) | 603 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 4,895 |
| Majority Ethnicity | White 95.14% |
| Metro/Micro Stats Area | Concord, NH |
| US Congressional District(s) | New Hampshire 2nd |
| State House Districts | Merrimack 3 |
| State Senate Districts | 7 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 95.14% |
| African American | 0.81% |
| Hispanic | 1.1% |
| Asian | 1.31% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 1.64% |