| | Mattituck, NY | Baiting Hollow, NY | United States |
| Population | 4,584 | 3,090 | 329,725,481 |
| Female Population | 52.9% | 53.4% | 50.5% |
| Male Population | 47.1% | 46.6% | 49.5% |
| Median Age | 58.1 | 52.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,146 | 1,764 | 309,327,143 |
| Population - 2000 | 4,198 | 1,449 | 285,036,114 |
| Population - 1990 | 3,902 | 1,012 | 251,960,433 |
| Pop. 2000 to Now | 13.4% | 11.7% | 15.6% |
| Pop. 1990 to Now | 22.0% | 59.9% | 30.8% |
| space4 | | | |
| Population Density | 509.5 | 964.7 | 93.4 |
| Land Area | 9.0 | 3.2 | 3,531,905.4 |
| Water Area | 0.4 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mattituck, NY | Baiting Hollow, NY | United States |
| Age 0 to 4 | 2.1% | 5.5% | 5.9% |
| Age 5 to 9 | 1.4% | 2.8% | 6.1% |
| Age 10 to 14 | 4.1% | 4.2% | 6.6% |
| Age 15 to 17 | 5.7% | 5.6% | 3.9% |
| Age 18 to 20 | 3.9% | 1.0% | 4.0% |
| Age 21 to 24 | 2.4% | 2.5% | 5.2% |
| Age 25 to 34 | 7.6% | 8.0% | 13.8% |
| Age 35 to 44 | 10.4% | 8.9% | 12.9% |
| Age 45 to 54 | 9.8% | 15.4% | 12.6% |
| Age 55 to 59 | 9.6% | 9.7% | 6.7% |
| Age 60 to 64 | 10.6% | 15.0% | 6.3% |
| Age 65 to 74 | 19.5% | 13.3% | 9.6% |
| Age 75 to 84 | 9.8% | 6.1% | 4.5% |
| Age 85 and over | 3.2% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mattituck, NY | Baiting Hollow, NY | United States |
| White | 93.9% | 88.8% | 59.4% |
| Black | 0.0% | 3.9% | 12.2% |
| Asian | 0.0% | 1.5% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.8% | 0.4% |
| Two or More Races | 0.4% | 2.0% | 3.2% |
| Hispanic | 5.7% | 2.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mattituck, NY | Baiting Hollow, NY | United States |
| Married Population | 57.8% | 65.8% | 49.8% |
| Currently Married | 57.3% | 64.7% | 48.0% |
| Married but Separated | 0.4% | 1.1% | 1.8% |
| Single Population | 42.2% | 34.2% | 50.2% |
| Never Married | 22.5% | 21.1% | 33.8% |
| Divorced | 12.0% | 7.2% | 10.8% |
| Widowed | 7.6% | 5.8% | 5.6% |
| space5 | | | |
| Household Size | 2.25 | 2.58 | 2.60 |
| Households | 2,028 | 1,193 | 124,010,992 |
| Family Households | 1,485 | 903 | 80,755,759 |
| Married couple, w/children | 18.6% | 31.6% | 30.5% |
| Married couple, no children | 63.1% | 53.5% | 42.9% |
| Non Family Households | 543 | 290 | 43,255,233 |
| Single householder, w/children | 5.9% | 6.1% | 15.8% |
| Single householder, no children | 12.4% | 8.9% | 10.8% |