| | Durham, NH | Claremont, NH | United States |
| Population | 15,410 | 12,955 | 329,725,481 |
| Female Population | 52.6% | 50.6% | 50.5% |
| Male Population | 47.4% | 49.4% | 49.5% |
| Median Age | 20.6 | 44.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 14,648 | 13,343 | 309,327,143 |
| Population - 2000 | 12,664 | 13,151 | 285,036,114 |
| Population - 1990 | 11,818 | 13,902 | 251,960,433 |
| Pop. 2000 to Now | 29.8% | -1.6% | 15.6% |
| Pop. 1990 to Now | 39.1% | -6.9% | 30.8% |
| space4 | | | |
| Population Density | 688.4 | 300.2 | 93.4 |
| Land Area | 22.4 | 43.2 | 3,531,905.4 |
| Water Area | 2.4 | 0.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Durham, NH | Claremont, NH | United States |
| Age 0 to 4 | 1.6% | 6.2% | 5.9% |
| Age 5 to 9 | 2.5% | 5.0% | 6.1% |
| Age 10 to 14 | 2.2% | 5.3% | 6.6% |
| Age 15 to 17 | 2.1% | 2.8% | 3.9% |
| Age 18 to 20 | 46.9% | 3.3% | 4.0% |
| Age 21 to 24 | 19.0% | 3.2% | 5.2% |
| Age 25 to 34 | 3.8% | 13.7% | 13.8% |
| Age 35 to 44 | 4.9% | 12.2% | 12.9% |
| Age 45 to 54 | 4.6% | 16.2% | 12.6% |
| Age 55 to 59 | 2.5% | 6.9% | 6.7% |
| Age 60 to 64 | 1.9% | 6.4% | 6.3% |
| Age 65 to 74 | 4.8% | 12.7% | 9.6% |
| Age 75 to 84 | 1.9% | 4.7% | 4.5% |
| Age 85 and over | 1.3% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Durham, NH | Claremont, NH | United States |
| White | 88.8% | 92.7% | 59.4% |
| Black | 0.6% | 1.4% | 12.2% |
| Asian | 3.7% | 0.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 3.7% | 2.3% | 3.2% |
| Hispanic | 3.0% | 3.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Durham, NH | Claremont, NH | United States |
| Married Population | 19.2% | 39.5% | 49.8% |
| Currently Married | 19.1% | 37.3% | 48.0% |
| Married but Separated | 0.1% | 2.3% | 1.8% |
| Single Population | 80.8% | 60.5% | 50.2% |
| Never Married | 76.1% | 35.1% | 33.8% |
| Divorced | 3.5% | 16.2% | 10.8% |
| Widowed | 1.3% | 9.2% | 5.6% |
| space5 | | | |
| Household Size | 2.54 | 2.46 | 2.60 |
| Households | 2,904 | 5,208 | 124,010,992 |
| Family Households | 1,575 | 2,804 | 80,755,759 |
| Married couple, w/children | 37.3% | 16.5% | 30.5% |
| Married couple, no children | 46.7% | 52.0% | 42.9% |
| Non Family Households | 1,329 | 2,404 | 43,255,233 |
| Single householder, w/children | 10.5% | 22.9% | 15.8% |
| Single householder, no children | 5.5% | 8.6% | 10.8% |