| | Porter, NY | Amherst, NY | United States |
| Population | 6,543 | 128,783 | 329,725,481 |
| Female Population | 47.9% | 51.6% | 50.5% |
| Male Population | 52.1% | 48.4% | 49.5% |
| Median Age | 47.2 | 39.4 | 38.4 |
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| Population - 2010 | 6,777 | 122,363 | 309,327,143 |
| Population - 2000 | 6,920 | 116,510 | 285,036,114 |
| Population - 1990 | 7,110 | 111,711 | 251,960,433 |
| Pop. 2000 to Now | -6.0% | 8.1% | 15.6% |
| Pop. 1990 to Now | -8.5% | 12.8% | 30.8% |
| space4 | | | |
| Population Density | 197.9 | 2,420.9 | 93.4 |
| Land Area | 33.1 | 53.2 | 3,531,905.4 |
| Water Area | 4.7 | 0.4 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Porter, NY | Amherst, NY | United States |
| Age 0 to 4 | 4.6% | 5.1% | 5.9% |
| Age 5 to 9 | 5.5% | 5.1% | 6.1% |
| Age 10 to 14 | 6.5% | 5.9% | 6.6% |
| Age 15 to 17 | 3.9% | 3.8% | 3.9% |
| Age 18 to 20 | 3.5% | 6.6% | 4.0% |
| Age 21 to 24 | 3.9% | 6.2% | 5.2% |
| Age 25 to 34 | 11.4% | 11.4% | 13.8% |
| Age 35 to 44 | 7.6% | 11.9% | 12.9% |
| Age 45 to 54 | 14.2% | 11.0% | 12.6% |
| Age 55 to 59 | 9.2% | 6.6% | 6.7% |
| Age 60 to 64 | 7.7% | 5.6% | 6.3% |
| Age 65 to 74 | 13.3% | 11.3% | 9.6% |
| Age 75 to 84 | 7.4% | 5.7% | 4.5% |
| Age 85 and over | 1.6% | 3.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Porter, NY | Amherst, NY | United States |
| White | 95.7% | 76.7% | 59.4% |
| Black | 0.4% | 5.5% | 12.2% |
| Asian | 1.1% | 9.7% | 5.6% |
| Native American | 0.6% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 0.5% | 3.1% | 3.2% |
| Hispanic | 1.7% | 4.5% | 18.4% |
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| Marriage & Family | | | |
| | Porter, NY | Amherst, NY | United States |
| Married Population | 58.9% | 49.0% | 49.8% |
| Currently Married | 57.4% | 48.1% | 48.0% |
| Married but Separated | 1.5% | 0.9% | 1.8% |
| Single Population | 41.1% | 51.0% | 50.2% |
| Never Married | 24.3% | 35.5% | 33.8% |
| Divorced | 10.8% | 9.2% | 10.8% |
| Widowed | 6.1% | 6.4% | 5.6% |
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| Household Size | 2.38 | 2.33 | 2.60 |
| Households | 2,745 | 51,766 | 124,010,992 |
| Family Households | 2,011 | 31,132 | 80,755,759 |
| Married couple, w/children | 30.2% | 32.4% | 30.5% |
| Married couple, no children | 48.0% | 47.0% | 42.9% |
| Non Family Households | 734 | 20,634 | 43,255,233 |
| Single householder, w/children | 10.5% | 10.9% | 15.8% |
| Single householder, no children | 11.3% | 9.7% | 10.8% |