| | Berlin, NH | Newmarket, NH | United States |
| Population | 9,710 | 9,365 | 329,725,481 |
| Female Population | 39.1% | 48.4% | 50.5% |
| Male Population | 60.9% | 51.7% | 49.5% |
| Median Age | 43.9 | 40.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,026 | 8,974 | 309,327,143 |
| Population - 2000 | 10,331 | 8,027 | 285,036,114 |
| Population - 1990 | 11,824 | 7,157 | 251,960,433 |
| Pop. 2000 to Now | -5.0% | 14.7% | 15.6% |
| Pop. 1990 to Now | -17.0% | 28.6% | 30.8% |
| space4 | | | |
| Population Density | 158.3 | 746.5 | 93.4 |
| Land Area | 61.3 | 12.5 | 3,531,905.4 |
| Water Area | 0.9 | 1.6 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Berlin, NH | Newmarket, NH | United States |
| Age 0 to 4 | 4.2% | 4.0% | 5.9% |
| Age 5 to 9 | 3.5% | 4.8% | 6.1% |
| Age 10 to 14 | 5.0% | 5.0% | 6.6% |
| Age 15 to 17 | 3.5% | 1.6% | 3.9% |
| Age 18 to 20 | 2.5% | 1.4% | 4.0% |
| Age 21 to 24 | 3.3% | 6.1% | 5.2% |
| Age 25 to 34 | 15.9% | 19.3% | 13.8% |
| Age 35 to 44 | 13.3% | 14.6% | 12.9% |
| Age 45 to 54 | 16.4% | 12.3% | 12.6% |
| Age 55 to 59 | 8.1% | 5.7% | 6.7% |
| Age 60 to 64 | 5.6% | 8.9% | 6.3% |
| Age 65 to 74 | 10.7% | 9.8% | 9.6% |
| Age 75 to 84 | 5.6% | 5.6% | 4.5% |
| Age 85 and over | 2.5% | 0.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Berlin, NH | Newmarket, NH | United States |
| White | 88.6% | 92.7% | 59.4% |
| Black | 6.0% | 1.2% | 12.2% |
| Asian | 0.1% | 2.3% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 0.0% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 1.2% | 2.4% | 3.2% |
| Hispanic | 3.8% | 1.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Berlin, NH | Newmarket, NH | United States |
| Married Population | 42.3% | 51.0% | 49.8% |
| Currently Married | 40.6% | 50.1% | 48.0% |
| Married but Separated | 1.8% | 0.9% | 1.8% |
| Single Population | 57.7% | 49.0% | 50.2% |
| Never Married | 34.6% | 33.0% | 33.8% |
| Divorced | 16.6% | 12.2% | 10.8% |
| Widowed | 6.5% | 3.9% | 5.6% |
| space5 | | | |
| Household Size | 2.15 | 2.17 | 2.60 |
| Households | 3,759 | 4,322 | 124,010,992 |
| Family Households | 2,263 | 2,319 | 80,755,759 |
| Married couple, w/children | 25.4% | 24.5% | 30.5% |
| Married couple, no children | 44.6% | 57.8% | 42.9% |
| Non Family Households | 1,496 | 2,003 | 43,255,233 |
| Single householder, w/children | 19.4% | 11.6% | 15.8% |
| Single householder, no children | 10.6% | 6.1% | 10.8% |