| Place Name | South Dennis |
| Place Type | Census Designated Place |
| ZIP Code(s) | 02660 |
| County | Barnstable County |
| Area Code(s) | 508,774 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 3,370 |
| Population Growth Rate (2010-19) | 7.03% |
| Majority Ethnicity | White 96.55% |
| 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 | 96.55% |
| African American | 1.3% |
| Hispanic | 0% |
| Asian | 1.86% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.28% |