| | Northwood, NH | Stamps, AR | United States |
| Population | 4,601 | 1,530 | 329,725,481 |
| Female Population | 53.5% | 54.7% | 50.5% |
| Male Population | 46.5% | 45.3% | 49.5% |
| Median Age | 44.2 | 40.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,249 | 1,692 | 309,327,143 |
| Population - 2000 | 3,640 | 2,131 | 285,036,114 |
| Population - 1990 | 3,124 | 2,478 | 251,960,433 |
| Pop. 2000 to Now | 18.8% | -31.2% | 15.6% |
| Pop. 1990 to Now | 38.4% | -40.8% | 30.8% |
| space4 | | | |
| Population Density | 164.0 | 507.0 | 93.4 |
| Land Area | 28.1 | 3.0 | 3,531,905.4 |
| Water Area | 2.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Northwood, NH | Stamps, AR | United States |
| Age 0 to 4 | 6.1% | 5.7% | 5.9% |
| Age 5 to 9 | 5.0% | 5.5% | 6.1% |
| Age 10 to 14 | 4.6% | 1.8% | 6.6% |
| Age 15 to 17 | 2.5% | 5.0% | 3.9% |
| Age 18 to 20 | 4.0% | 6.1% | 4.0% |
| Age 21 to 24 | 3.6% | 8.2% | 5.2% |
| Age 25 to 34 | 12.8% | 8.2% | 13.8% |
| Age 35 to 44 | 12.7% | 15.2% | 12.9% |
| Age 45 to 54 | 10.1% | 11.9% | 12.6% |
| Age 55 to 59 | 11.8% | 4.2% | 6.7% |
| Age 60 to 64 | 5.1% | 3.3% | 6.3% |
| Age 65 to 74 | 16.4% | 13.0% | 9.6% |
| Age 75 to 84 | 3.1% | 7.7% | 4.5% |
| Age 85 and over | 2.2% | 4.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Northwood, NH | Stamps, AR | United States |
| White | 91.9% | 30.7% | 59.4% |
| Black | 1.9% | 60.4% | 12.2% |
| Asian | 1.0% | 2.9% | 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 | 0.9% | 4.6% | 3.2% |
| Hispanic | 4.3% | 1.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Northwood, NH | Stamps, AR | United States |
| Married Population | 65.3% | 25.8% | 49.8% |
| Currently Married | 63.7% | 22.5% | 48.0% |
| Married but Separated | 1.6% | 3.2% | 1.8% |
| Single Population | 34.7% | 74.2% | 50.2% |
| Never Married | 21.4% | 43.8% | 33.8% |
| Divorced | 9.0% | 15.2% | 10.8% |
| Widowed | 4.3% | 15.2% | 5.6% |
| space5 | | | |
| Household Size | 2.64 | 2.45 | 2.60 |
| Households | 1,746 | 606 | 124,010,992 |
| Family Households | 1,422 | 260 | 80,755,759 |
| Married couple, w/children | 31.4% | 6.2% | 30.5% |
| Married couple, no children | 53.2% | 49.2% | 42.9% |
| Non Family Households | 324 | 346 | 43,255,233 |
| Single householder, w/children | 7.3% | 26.2% | 15.8% |
| Single householder, no children | 8.0% | 18.5% | 10.8% |