| Place Name | Alstead |
| Place Type | Town |
| ZIP Code(s) | 03602 |
| County | Cheshire County |
| Area Code(s) | 603 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 1,626 |
| Majority Ethnicity | White 97.04% |
| Metro/Micro Stats Area | Keene, NH |
| US Congressional District(s) | New Hampshire 2nd |
| State House Districts | Cheshire 2 |
| State Senate Districts | 10 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.04% |
| African American | 0% |
| Hispanic | 0.06% |
| Asian | 0.77% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.12% |