| Place Name | Mattapoisett |
| Place Type | Town |
| ZIP Code(s) | 02739 |
| County | Plymouth County |
| Area Code(s) | 508,774 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 6,478 |
| Majority Ethnicity | White 97.87% |
| Metro/Micro Stats Area | Boston-Cambridge-Newton, MA-NH |
| US Congressional District(s) | Massachusetts 9th |
| State House Districts | 10th Bristol |
| State Senate Districts | Second Bristol and Plymouth |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.87% |
| African American | 0% |
| Hispanic | 0.73% |
| Asian | 0.44% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.96% |