| Place Name | Portsmouth |
| Place Type | City |
| ZIP Code(s) | 03801 |
| County | Rockingham County |
| Area Code(s) | 603 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 21,140 |
| Population Growth Rate (2010-19) | 5.66% |
| Majority Ethnicity | White 91.17% |
| Metro/Micro Stats Area | Boston-Cambridge-Newton, MA-NH |
| US Congressional District(s) | New Hampshire 1st |
| State House Districts | Rockingham 25,Rockingham 26,Rockingham 27,Rockingham 28,Rockingham 29 |
| State Senate Districts | 21 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 91.17% |
| African American | 1.4% |
| Hispanic | 0% |
| Asian | 5.11% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.31% |