| Place Name | Langdon |
| Place Type | Town |
| ZIP Code(s) | 03602 03603 03607 |
| County | Sullivan County |
| Area Code(s) | 603 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 683 |
| Majority Ethnicity | White 98.34% |
| Metro/Micro Stats Area | Lebanon, NH-VT |
| US Congressional District(s) | New Hampshire 2nd |
| State House Districts | Sullivan 7 |
| State Senate Districts | 8 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 98.34% |
| African American | 1.51% |
| Hispanic | 0% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.15% |