| Place Name | Somersworth |
| Place Type | City |
| ZIP Code(s) | 03878 |
| County | Strafford County |
| Area Code(s) | 603,207 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 11,782 |
| Population Growth Rate (2010-19) | 0.76% |
| Majority Ethnicity | White 88.71% |
| Metro/Micro Stats Area | Boston-Cambridge-Newton, MA-NH |
| US Congressional District(s) | New Hampshire 1st |
| State House Districts | 5,Strafford 17,Strafford 18 |
| State Senate Districts | 35,4 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 88.71% |
| African American | 1.78% |
| Hispanic | 0.05% |
| Asian | 4.92% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.54% |