| Index | Cos Cob | Connecticut | National |
| Income per capita | $75,589 | $39,906 | $29,829 |
| Median household income | $136,642 | $71,755 | $55,322 |
| Median income owner occupied | $193,214 | $94,523 | $70,586 |
| Median income renter occupied | $63,393 | $37,585 | $35,192 |
| Median earnings male | $82,054 | $46,559 | $36,919 |
| Median earnings female | $53,750 | $31,943 | $26,250 |
| Unemployment rate | 4.3% | 5.3% | 4.7% |
| Poverty level | 6.7% | 10.4% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 16.8% | 16.8% |
| Manufacturing sector | 6.1% | 6.1% |
| Financial & insurance services | 20.2% | 20.2% |
| Wholesale & retail services | 3.8% | 3.8% |
| Public administration | 3.6% | 3.6% |
| Transportation, warehousing & utilities | 3.4% | 3.4% |
| Education, health & social services | 5.5% | 5.5% |
| Other | 31.9% | 31.9% |
| City | Population | Household Income | National Avg. |
| Cold Spring Harbor, NY | 2,864 | $250,001 | 351.9% |
| Sands Point, NY | 2,785 | $250,001 | 351.9% |
| Laurel Hollow, NY | 1,967 | $250,001 | 351.9% |
| Scarsdale, NY | 17,890 | $250,001 | 351.9% |
| Huntington Bay, NY | 1,614 | $250,001 | 351.9% |
| Cos Cob, CT | 7,065 | $136,642 | 147.0% |
| City | Population | Household Income | National Avg. |
| Hewlett, NY | 7,064 | $104,931 | 89.7% |
| Delphos, OH | 7,066 | $51,752 | 6.5% |
| Hudson Falls, NY | 7,067 | $50,412 | 8.9% |
| Saint-Apollinaire, QC | 7,067 | n/a | |
| Clarkston Heights-Vineland, WA | 7,062 | $83,457 | 50.9% |
| Cos Cob, CT | 7,065 | $136,642 | 147.0% |