| Place Name | Dennis (town) |
| Place Type | Town |
| County | Barnstable County |
| Area Code(s) | 508,774 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 14,664 |
| Majority Ethnicity | White 91.37% |
| Metro/Micro Stats Area | Barnstable Town, MA |
| US Congressional District(s) | Massachusetts 9th |
| State House Districts | 1st Barnstable |
| State Senate Districts | Cape and Islands |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 91.37% |
| African American | 2.88% |
| Hispanic | 0.54% |
| Asian | 0.73% |
| Native American | 0.06% |
| Hawaiin/Pacific Islander | 4.41% |