| | Erving, MA | Winchester, NH | United States |
| Population | 1,697 | 4,171 | 329,725,481 |
| Female Population | 53.9% | 52.8% | 50.5% |
| Male Population | 46.1% | 47.2% | 49.5% |
| Median Age | 43 | 38 | 38.4 |
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| Population - 2010 | 1,799 | 4,341 | 309,327,143 |
| Population - 2000 | 1,467 | 4,144 | 285,036,114 |
| Population - 1990 | 1,372 | 4,038 | 251,960,433 |
| Pop. 2000 to Now | 19.2% | 1.8% | 15.6% |
| Pop. 1990 to Now | 27.5% | 4.4% | 30.8% |
| space4 | | | |
| Population Density | 122.8 | 75.9 | 93.4 |
| Land Area | 13.8 | 55.0 | 3,531,905.4 |
| Water Area | 0.6 | 0.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Erving, MA | Winchester, NH | United States |
| Age 0 to 4 | 6.5% | 8.2% | 5.9% |
| Age 5 to 9 | 5.7% | 5.6% | 6.1% |
| Age 10 to 14 | 6.0% | 6.6% | 6.6% |
| Age 15 to 17 | 2.9% | 2.9% | 3.9% |
| Age 18 to 20 | 5.9% | 1.6% | 4.0% |
| Age 21 to 24 | 1.7% | 8.9% | 5.2% |
| Age 25 to 34 | 11.0% | 12.7% | 13.8% |
| Age 35 to 44 | 16.6% | 12.8% | 12.9% |
| Age 45 to 54 | 13.6% | 7.9% | 12.6% |
| Age 55 to 59 | 6.1% | 9.9% | 6.7% |
| Age 60 to 64 | 6.0% | 8.6% | 6.3% |
| Age 65 to 74 | 11.9% | 8.9% | 9.6% |
| Age 75 to 84 | 5.0% | 3.7% | 4.5% |
| Age 85 and over | 1.2% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Erving, MA | Winchester, NH | United States |
| White | 90.7% | 98.3% | 59.4% |
| Black | 1.8% | 0.5% | 12.2% |
| Asian | 0.0% | 0.2% | 5.6% |
| Native American | 0.8% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.9% | 0.8% | 3.2% |
| Hispanic | 3.8% | 0.0% | 18.4% |
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| Marriage & Family | | | |
| | Erving, MA | Winchester, NH | United States |
| Married Population | 51.1% | 44.6% | 49.8% |
| Currently Married | 49.7% | 43.2% | 48.0% |
| Married but Separated | 1.4% | 1.4% | 1.8% |
| Single Population | 48.9% | 55.4% | 50.2% |
| Never Married | 30.9% | 32.3% | 33.8% |
| Divorced | 13.1% | 18.1% | 10.8% |
| Widowed | 4.9% | 5.0% | 5.6% |
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| Household Size | 2.49 | 2.59 | 2.60 |
| Households | 681 | 1,579 | 124,010,992 |
| Family Households | 425 | 881 | 80,755,759 |
| Married couple, w/children | 34.4% | 34.8% | 30.5% |
| Married couple, no children | 47.3% | 42.1% | 42.9% |
| Non Family Households | 256 | 698 | 43,255,233 |
| Single householder, w/children | 9.9% | 15.0% | 15.8% |
| Single householder, no children | 8.5% | 8.1% | 10.8% |