| | Waterford, CT | Sagaponack, NY | United States |
| Population | 19,558 | 247 | 329,725,481 |
| Female Population | 52.2% | 51.8% | 50.5% |
| Male Population | 47.8% | 48.2% | 49.5% |
| Median Age | 46.6 | 63.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 19,498 | 314 | 309,327,143 |
| Population - 2000 | 19,152 | 582 | 285,036,114 |
| Population - 1990 | 17,930 | 311 | 251,960,433 |
| Pop. 2000 to Now | -1.5% | -44.5% | 15.6% |
| Pop. 1990 to Now | 5.2% | 3.9% | 30.8% |
| space4 | | | |
| Population Density | 598.1 | 56.0 | 93.4 |
| Land Area | 32.7 | 4.4 | 3,531,905.4 |
| Water Area | 11.8 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Waterford, CT | Sagaponack, NY | United States |
| Age 0 to 4 | 5.0% | 0.0% | 5.9% |
| Age 5 to 9 | 4.3% | 0.0% | 6.1% |
| Age 10 to 14 | 6.1% | 3.2% | 6.6% |
| Age 15 to 17 | 3.7% | 4.0% | 3.9% |
| Age 18 to 20 | 2.9% | 4.5% | 4.0% |
| Age 21 to 24 | 3.7% | 3.2% | 5.2% |
| Age 25 to 34 | 11.9% | 6.1% | 13.8% |
| Age 35 to 44 | 11.1% | 8.5% | 12.9% |
| Age 45 to 54 | 15.1% | 2.4% | 12.6% |
| Age 55 to 59 | 8.3% | 10.9% | 6.7% |
| Age 60 to 64 | 6.6% | 10.5% | 6.3% |
| Age 65 to 74 | 10.8% | 22.3% | 9.6% |
| Age 75 to 84 | 7.0% | 18.6% | 4.5% |
| Age 85 and over | 3.4% | 5.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Waterford, CT | Sagaponack, NY | United States |
| White | 84.1% | 96.8% | 59.4% |
| Black | 2.3% | 0.0% | 12.2% |
| Asian | 4.1% | 0.0% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.8% | 0.0% | 3.2% |
| Hispanic | 5.5% | 3.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Waterford, CT | Sagaponack, NY | United States |
| Married Population | 54.2% | 48.1% | 49.8% |
| Currently Married | 53.6% | 45.6% | 48.0% |
| Married but Separated | 0.7% | 2.5% | 1.8% |
| Single Population | 45.8% | 51.9% | 50.2% |
| Never Married | 26.3% | 27.2% | 33.8% |
| Divorced | 12.7% | 5.9% | 10.8% |
| Widowed | 6.7% | 18.8% | 5.6% |
| space5 | | | |
| Household Size | 2.33 | 2.04 | 2.60 |
| Households | 8,191 | 121 | 124,010,992 |
| Family Households | 5,481 | 69 | 80,755,759 |
| Married couple, w/children | 29.9% | 2.9% | 30.5% |
| Married couple, no children | 48.1% | 65.2% | 42.9% |
| Non Family Households | 2,710 | 52 | 43,255,233 |
| Single householder, w/children | 11.8% | 24.6% | 15.8% |
| Single householder, no children | 10.2% | 7.2% | 10.8% |