| | Gorham, ME | Amherst, NH | United States |
| Population | 18,114 | 11,712 | 329,725,481 |
| Female Population | 51.3% | 50.9% | 50.5% |
| Male Population | 48.7% | 49.1% | 49.5% |
| Median Age | 36.1 | 46.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 16,364 | 11,204 | 309,327,143 |
| Population - 2000 | 14,141 | 10,769 | 285,036,114 |
| Population - 1990 | 11,856 | 9,068 | 251,960,433 |
| Pop. 2000 to Now | 27.0% | 6.0% | 15.6% |
| Pop. 1990 to Now | 51.5% | 25.9% | 30.8% |
| space4 | | | |
| Population Density | 357.9 | 342.6 | 93.4 |
| Land Area | 50.6 | 34.2 | 3,531,905.4 |
| Water Area | 0.7 | 0.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Gorham, ME | Amherst, NH | United States |
| Age 0 to 4 | 4.9% | 5.6% | 5.9% |
| Age 5 to 9 | 6.7% | 5.7% | 6.1% |
| Age 10 to 14 | 9.2% | 7.0% | 6.6% |
| Age 15 to 17 | 3.1% | 4.2% | 3.9% |
| Age 18 to 20 | 8.8% | 3.7% | 4.0% |
| Age 21 to 24 | 5.1% | 2.1% | 5.2% |
| Age 25 to 34 | 11.2% | 8.1% | 13.8% |
| Age 35 to 44 | 12.9% | 12.0% | 12.9% |
| Age 45 to 54 | 12.9% | 15.0% | 12.6% |
| Age 55 to 59 | 5.2% | 7.7% | 6.7% |
| Age 60 to 64 | 6.3% | 10.7% | 6.3% |
| Age 65 to 74 | 8.4% | 12.6% | 9.6% |
| Age 75 to 84 | 3.5% | 3.6% | 4.5% |
| Age 85 and over | 1.9% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Gorham, ME | Amherst, NH | United States |
| White | 89.3% | 93.8% | 59.4% |
| Black | 1.0% | 0.0% | 12.2% |
| Asian | 1.5% | 1.6% | 5.6% |
| Native American | 0.3% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 5.9% | 1.7% | 3.2% |
| Hispanic | 1.8% | 2.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Gorham, ME | Amherst, NH | United States |
| Married Population | 54.1% | 68.8% | 49.8% |
| Currently Married | 54.1% | 67.8% | 48.0% |
| Married but Separated | 0.1% | 1.1% | 1.8% |
| Single Population | 45.9% | 31.2% | 50.2% |
| Never Married | 30.2% | 18.6% | 33.8% |
| Divorced | 9.7% | 7.6% | 10.8% |
| Widowed | 6.0% | 4.9% | 5.6% |
| space5 | | | |
| Household Size | 2.73 | 2.64 | 2.60 |
| Households | 6,092 | 4,438 | 124,010,992 |
| Family Households | 4,454 | 3,405 | 80,755,759 |
| Married couple, w/children | 40.2% | 37.0% | 30.5% |
| Married couple, no children | 44.8% | 54.1% | 42.9% |
| Non Family Households | 1,638 | 1,033 | 43,255,233 |
| Single householder, w/children | 9.3% | 4.3% | 15.8% |
| Single householder, no children | 5.7% | 4.5% | 10.8% |