| | Campton, NH | Alexandria, NH | United States |
| Population | 3,368 | 1,934 | 329,725,481 |
| Female Population | 54.9% | 47.9% | 50.5% |
| Male Population | 45.1% | 52.1% | 49.5% |
| Median Age | 44.1 | 52.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,331 | 1,621 | 309,327,143 |
| Population - 2000 | 2,719 | 1,329 | 285,036,114 |
| Population - 1990 | 2,377 | 1,190 | 251,960,433 |
| Pop. 2000 to Now | 22.7% | 22.5% | 15.6% |
| Pop. 1990 to Now | 40.3% | 36.8% | 30.8% |
| space4 | | | |
| Population Density | 65.0 | 45.0 | 93.4 |
| Land Area | 51.8 | 42.9 | 3,531,905.4 |
| Water Area | 0.7 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Campton, NH | Alexandria, NH | United States |
| Age 0 to 4 | 2.2% | 1.9% | 5.9% |
| Age 5 to 9 | 0.6% | 5.2% | 6.1% |
| Age 10 to 14 | 9.5% | 3.1% | 6.6% |
| Age 15 to 17 | 6.1% | 1.4% | 3.9% |
| Age 18 to 20 | 8.0% | 1.9% | 4.0% |
| Age 21 to 24 | 4.6% | 2.3% | 5.2% |
| Age 25 to 34 | 9.7% | 8.0% | 13.8% |
| Age 35 to 44 | 10.2% | 10.8% | 12.9% |
| Age 45 to 54 | 18.1% | 20.7% | 12.6% |
| Age 55 to 59 | 12.6% | 10.6% | 6.7% |
| Age 60 to 64 | 4.0% | 11.2% | 6.3% |
| Age 65 to 74 | 8.2% | 13.5% | 9.6% |
| Age 75 to 84 | 4.7% | 5.2% | 4.5% |
| Age 85 and over | 1.5% | 4.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Campton, NH | Alexandria, NH | United States |
| White | 99.2% | 98.2% | 59.4% |
| Black | 0.1% | 0.0% | 12.2% |
| Asian | 0.0% | 0.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.3% | 0.6% | 3.2% |
| Hispanic | 0.3% | 0.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Campton, NH | Alexandria, NH | United States |
| Married Population | 43.4% | 56.6% | 49.8% |
| Currently Married | 40.6% | 55.6% | 48.0% |
| Married but Separated | 2.8% | 1.0% | 1.8% |
| Single Population | 56.6% | 43.4% | 50.2% |
| Never Married | 35.6% | 25.4% | 33.8% |
| Divorced | 15.1% | 12.6% | 10.8% |
| Widowed | 5.9% | 5.4% | 5.6% |
| space5 | | | |
| Household Size | 2.86 | 2.74 | 2.60 |
| Households | 1,165 | 705 | 124,010,992 |
| Family Households | 685 | 545 | 80,755,759 |
| Married couple, w/children | 44.4% | 15.6% | 30.5% |
| Married couple, no children | 36.5% | 72.5% | 42.9% |
| Non Family Households | 480 | 160 | 43,255,233 |
| Single householder, w/children | 8.5% | 7.2% | 15.8% |
| Single householder, no children | 10.7% | 4.8% | 10.8% |