| | Fremont, NH | Watertown Town, MA | United States |
| Population | 4,680 | 35,171 | 329,725,481 |
| Female Population | 51.2% | 53.6% | 50.5% |
| Male Population | 48.8% | 46.4% | 49.5% |
| Median Age | 42.5 | 39 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,292 | 32,058 | 309,327,143 |
| Population - 2000 | 3,510 | 32,986 | 285,036,114 |
| Population - 1990 | 2,576 | 33,284 | 251,960,433 |
| Pop. 2000 to Now | 35.0% | 9.5% | 15.6% |
| Pop. 1990 to Now | 84.0% | 8.5% | 30.8% |
| space4 | | | |
| Population Density | 273.6 | 8,795.0 | 93.4 |
| Land Area | 17.1 | 4.0 | 3,531,905.4 |
| Water Area | 0.3 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Fremont, NH | Watertown Town, MA | United States |
| Age 0 to 4 | 5.6% | 5.8% | 5.9% |
| Age 5 to 9 | 8.0% | 2.9% | 6.1% |
| Age 10 to 14 | 5.2% | 3.5% | 6.6% |
| Age 15 to 17 | 2.6% | 2.2% | 3.9% |
| Age 18 to 20 | 6.0% | 2.6% | 4.0% |
| Age 21 to 24 | 4.5% | 3.6% | 5.2% |
| Age 25 to 34 | 11.3% | 21.4% | 13.8% |
| Age 35 to 44 | 12.8% | 15.5% | 12.9% |
| Age 45 to 54 | 16.9% | 11.2% | 12.6% |
| Age 55 to 59 | 5.5% | 6.5% | 6.7% |
| Age 60 to 64 | 7.0% | 7.4% | 6.3% |
| Age 65 to 74 | 7.8% | 9.9% | 9.6% |
| Age 75 to 84 | 4.3% | 5.0% | 4.5% |
| Age 85 and over | 2.5% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Fremont, NH | Watertown Town, MA | United States |
| White | 94.6% | 72.5% | 59.4% |
| Black | 0.0% | 3.6% | 12.2% |
| Asian | 1.5% | 11.9% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.4% | 0.2% | 0.4% |
| Two or More Races | 2.5% | 4.1% | 3.2% |
| Hispanic | 1.1% | 7.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Fremont, NH | Watertown Town, MA | United States |
| Married Population | 63.4% | 50.0% | 49.8% |
| Currently Married | 61.8% | 48.8% | 48.0% |
| Married but Separated | 1.6% | 1.1% | 1.8% |
| Single Population | 36.6% | 50.0% | 50.2% |
| Never Married | 25.9% | 37.7% | 33.8% |
| Divorced | 6.3% | 7.7% | 10.8% |
| Widowed | 4.4% | 4.7% | 5.6% |
| space5 | | | |
| Household Size | 2.83 | 2.18 | 2.60 |
| Households | 1,638 | 16,027 | 124,010,992 |
| Family Households | 1,347 | 8,748 | 80,755,759 |
| Married couple, w/children | 33.9% | 31.8% | 30.5% |
| Married couple, no children | 48.6% | 45.0% | 42.9% |
| Non Family Households | 291 | 7,279 | 43,255,233 |
| Single householder, w/children | 10.2% | 8.4% | 15.8% |
| Single householder, no children | 7.2% | 14.9% | 10.8% |