| Place Name | Londonderry (town) |
| Place Type | Town |
| County | Rockingham County |
| Area Code(s) | 603 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 25,708 |
| Majority Ethnicity | White 92.99% |
| Metro/Micro Stats Area | Boston-Cambridge-Newton, MA-NH |
| US Congressional District(s) | New Hampshire 1st |
| State House Districts | Rockingham 5 |
| State Senate Districts | 14 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 92.99% |
| African American | 1.34% |
| Hispanic | 0.08% |
| Asian | 1.8% |
| Native American | 0.08% |
| Hawaiin/Pacific Islander | 3.7% |