| Index | South Dennis | Massachusetts | National |
| Income per capita | $34,686 | $38,069 | $29,829 |
| Median household income | $61,971 | $70,954 | $55,322 |
| Median income owner occupied | $69,013 | $95,052 | $70,586 |
| Median income renter occupied | $56,000 | $39,116 | $35,192 |
| Median earnings male | $37,628 | $45,946 | $36,919 |
| Median earnings female | $30,978 | $32,028 | $26,250 |
| Unemployment rate | 1.1% | 4.6% | 4.7% |
| Poverty level | 7.8% | 11.4% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 15.1% | 15.1% |
| Manufacturing sector | 3.3% | 3.3% |
| Financial & insurance services | 5.4% | 5.4% |
| Wholesale & retail services | 14.7% | 14.7% |
| Public administration | 4.1% | 4.1% |
| Transportation, warehousing & utilities | 10.9% | 10.9% |
| Education, health & social services | 15.0% | 15.0% |
| Other | 30.4% | 30.4% |
| City | Population | Household Income | National Avg. |
| East Sandwich, MA | 3,628 | $102,258 | 84.8% |
| Dennis, MA | 1,962 | $93,726 | 69.4% |
| East Harwich, MA | 4,756 | $88,125 | 59.3% |
| West Chatham, MA | 1,224 | $84,412 | 52.6% |
| Yarmouth Port, MA | 5,202 | $83,056 | 50.1% |
| South Dennis, MA | 2,895 | $61,971 | 12.0% |
| City | Population | Household Income | National Avg. |
| Milaca, MN | 2,894 | $41,695 | 24.6% |
| Claryville, KY | 2,896 | $85,981 | 55.4% |
| Lake Wissota, WI | 2,896 | $96,065 | 73.6% |
| Palo Cedro, CA | 2,893 | $96,292 | 74.1% |
| Deer Lodge, MT | 2,893 | $36,168 | 34.6% |
| South Dennis, MA | 2,895 | $61,971 | 12.0% |