| | Farmingdale, NY | Carle Place, NY | United States |
| Population | 8,468 | 5,177 | 329,725,481 |
| Female Population | 51.6% | 49.3% | 50.5% |
| Male Population | 48.5% | 50.7% | 49.5% |
| Median Age | 45.7 | 40.9 | 38.4 |
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| Population - 2010 | 8,239 | 5,588 | 309,327,143 |
| Population - 2000 | 8,399 | 5,247 | 285,036,114 |
| Population - 1990 | 8,022 | 5,107 | 251,960,433 |
| Pop. 2000 to Now | 6.9% | -6.5% | 15.6% |
| Pop. 1990 to Now | 12.0% | -4.0% | 30.8% |
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| Population Density | 7,554.0 | 5,536.9 | 93.4 |
| Land Area | 1.1 | 0.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Farmingdale, NY | Carle Place, NY | United States |
| Age 0 to 4 | 4.8% | 3.9% | 5.9% |
| Age 5 to 9 | 4.0% | 3.2% | 6.1% |
| Age 10 to 14 | 5.4% | 8.1% | 6.6% |
| Age 15 to 17 | 2.9% | 4.7% | 3.9% |
| Age 18 to 20 | 1.8% | 3.2% | 4.0% |
| Age 21 to 24 | 3.9% | 4.9% | 5.2% |
| Age 25 to 34 | 14.8% | 15.4% | 13.8% |
| Age 35 to 44 | 11.9% | 12.5% | 12.9% |
| Age 45 to 54 | 10.2% | 12.6% | 12.6% |
| Age 55 to 59 | 13.7% | 8.5% | 6.7% |
| Age 60 to 64 | 7.6% | 8.3% | 6.3% |
| Age 65 to 74 | 11.3% | 9.6% | 9.6% |
| Age 75 to 84 | 4.4% | 3.7% | 4.5% |
| Age 85 and over | 3.3% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Farmingdale, NY | Carle Place, NY | United States |
| White | 73.5% | 73.2% | 59.4% |
| Black | 5.1% | 1.6% | 12.2% |
| Asian | 7.2% | 11.9% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 2.4% | 0.4% |
| Two or More Races | 3.0% | 1.4% | 3.2% |
| Hispanic | 11.1% | 9.5% | 18.4% |
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| Marriage & Family | | | |
| | Farmingdale, NY | Carle Place, NY | United States |
| Married Population | 46.9% | 55.8% | 49.8% |
| Currently Married | 44.4% | 55.6% | 48.0% |
| Married but Separated | 2.5% | 0.2% | 1.8% |
| Single Population | 53.1% | 44.2% | 50.2% |
| Never Married | 32.0% | 31.2% | 33.8% |
| Divorced | 13.3% | 6.1% | 10.8% |
| Widowed | 7.9% | 6.8% | 5.6% |
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| Household Size | 2.36 | 2.82 | 2.60 |
| Households | 3,527 | 1,834 | 124,010,992 |
| Family Households | 1,991 | 1,501 | 80,755,759 |
| Married couple, w/children | 36.8% | 29.9% | 30.5% |
| Married couple, no children | 39.5% | 48.3% | 42.9% |
| Non Family Households | 1,536 | 333 | 43,255,233 |
| Single householder, w/children | 9.4% | 13.2% | 15.8% |
| Single householder, no children | 14.2% | 8.6% | 10.8% |