Demographics & People — South Dennis, Massachusetts
Population Overview
| Population (Census) | 3,190 |
| Estimated 2026 | ~3,000 |
| Median Age | 57.6 |
| Total Households | 1,556 |
| Family Households | 913 |
| Average Household Size | 2.01 |
| Diversity Index | N/A (N/A) |
Race & Ethnicity
| White | 2,918 |
| Black or African American | 127 |
| Asian | 17 |
| Hispanic or Latino | 22 |
Heritage & Ancestry
| Group | Count |
| Irish | 956 |
| Unclassified or not reported | 628 |
| English | 465 |
| Italian | 373 |
| French Canadian | 228 |
| German | 209 |
| Other groups | 206 |
| French (except Basque) | 205 |
| Polish | 169 |
| West Indian (except Hispanic groups) | 139 |
Language
| English Only | 3,018 |
| Spanish | 0 |
| Population 5+ | 3,094 |
Veterans
| Veterans | 204 |
| Population 18+ | 2,741 |
Commuting
| Mean Commute Time | 24.7 minutes |
| Work from Home | 9.5% |
| Commuter Profile | N/A |
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for South Dennis, Massachusetts.