| | Danville, NH | Sandown, NH | United States |
| Population | 4,435 | 6,498 | 329,725,481 |
| Female Population | 52.1% | 50.4% | 50.5% |
| Male Population | 47.9% | 49.6% | 49.5% |
| Median Age | 44.2 | 38.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,383 | 5,999 | 309,327,143 |
| Population - 2000 | 4,023 | 5,143 | 285,036,114 |
| Population - 1990 | 2,534 | 4,060 | 251,960,433 |
| Pop. 2000 to Now | 14.2% | 27.4% | 15.6% |
| Pop. 1990 to Now | 81.4% | 61.4% | 30.8% |
| space4 | | | |
| Population Density | 378.5 | 465.8 | 93.4 |
| Land Area | 11.7 | 14.0 | 3,531,905.4 |
| Water Area | 0.2 | 0.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Danville, NH | Sandown, NH | United States |
| Age 0 to 4 | 4.1% | 6.5% | 5.9% |
| Age 5 to 9 | 4.6% | 4.1% | 6.1% |
| Age 10 to 14 | 10.5% | 8.6% | 6.6% |
| Age 15 to 17 | 3.7% | 3.9% | 3.9% |
| Age 18 to 20 | 2.6% | 2.9% | 4.0% |
| Age 21 to 24 | 3.7% | 4.2% | 5.2% |
| Age 25 to 34 | 11.7% | 12.4% | 13.8% |
| Age 35 to 44 | 10.6% | 12.4% | 12.9% |
| Age 45 to 54 | 15.5% | 17.0% | 12.6% |
| Age 55 to 59 | 10.0% | 10.4% | 6.7% |
| Age 60 to 64 | 11.5% | 5.5% | 6.3% |
| Age 65 to 74 | 8.2% | 8.3% | 9.6% |
| Age 75 to 84 | 2.8% | 2.6% | 4.5% |
| Age 85 and over | 0.5% | 1.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Danville, NH | Sandown, NH | United States |
| White | 95.1% | 94.1% | 59.4% |
| Black | 0.2% | 0.6% | 12.2% |
| Asian | 0.6% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 1.1% | 0.4% |
| Two or More Races | 2.9% | 0.7% | 3.2% |
| Hispanic | 1.2% | 3.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Danville, NH | Sandown, NH | United States |
| Married Population | 55.6% | 65.2% | 49.8% |
| Currently Married | 55.1% | 61.4% | 48.0% |
| Married but Separated | 0.5% | 3.7% | 1.8% |
| Single Population | 44.4% | 34.8% | 50.2% |
| Never Married | 26.7% | 24.6% | 33.8% |
| Divorced | 10.9% | 6.4% | 10.8% |
| Widowed | 6.8% | 3.8% | 5.6% |
| space5 | | | |
| Household Size | 2.58 | 2.94 | 2.60 |
| Households | 1,719 | 2,211 | 124,010,992 |
| Family Households | 1,305 | 1,859 | 80,755,759 |
| Married couple, w/children | 26.2% | 31.9% | 30.5% |
| Married couple, no children | 49.0% | 48.6% | 42.9% |
| Non Family Households | 414 | 352 | 43,255,233 |
| Single householder, w/children | 23.4% | 17.4% | 15.8% |
| Single householder, no children | 1.5% | 2.1% | 10.8% |