| | Stow, MA | Cohasset, MA | United States |
| Population | 7,130 | 8,295 | 329,725,481 |
| Female Population | 48.5% | 52.9% | 50.5% |
| Male Population | 51.5% | 47.1% | 49.5% |
| Median Age | 40.9 | 45.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,633 | 7,549 | 309,327,143 |
| Population - 2000 | 5,902 | 7,261 | 285,036,114 |
| Population - 1990 | 5,328 | 7,075 | 251,960,433 |
| Pop. 2000 to Now | 21.6% | 17.5% | 15.6% |
| Pop. 1990 to Now | 34.7% | 20.6% | 30.8% |
| space4 | | | |
| Population Density | 411.8 | 847.4 | 93.4 |
| Land Area | 17.3 | 9.8 | 3,531,905.4 |
| Water Area | 0.7 | 21.6 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Stow, MA | Cohasset, MA | United States |
| Age 0 to 4 | 5.6% | 9.0% | 5.9% |
| Age 5 to 9 | 8.1% | 8.5% | 6.1% |
| Age 10 to 14 | 8.1% | 7.0% | 6.6% |
| Age 15 to 17 | 4.7% | 3.8% | 3.9% |
| Age 18 to 20 | 2.2% | 1.0% | 4.0% |
| Age 21 to 24 | 3.0% | 2.8% | 5.2% |
| Age 25 to 34 | 10.2% | 5.3% | 13.8% |
| Age 35 to 44 | 13.2% | 12.4% | 12.9% |
| Age 45 to 54 | 14.1% | 15.0% | 12.6% |
| Age 55 to 59 | 8.9% | 11.0% | 6.7% |
| Age 60 to 64 | 5.7% | 7.2% | 6.3% |
| Age 65 to 74 | 10.6% | 9.7% | 9.6% |
| Age 75 to 84 | 2.9% | 4.2% | 4.5% |
| Age 85 and over | 2.8% | 3.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Stow, MA | Cohasset, MA | United States |
| White | 83.9% | 93.8% | 59.4% |
| Black | 2.6% | 1.0% | 12.2% |
| Asian | 5.5% | 0.4% | 5.6% |
| Native American | 0.0% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.4% | 0.2% |
| Other | 3.2% | 1.2% | 0.4% |
| Two or More Races | 3.8% | 1.7% | 3.2% |
| Hispanic | 0.9% | 1.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Stow, MA | Cohasset, MA | United States |
| Married Population | 70.0% | 66.8% | 49.8% |
| Currently Married | 67.0% | 65.6% | 48.0% |
| Married but Separated | 3.1% | 1.2% | 1.8% |
| Single Population | 30.0% | 33.2% | 50.2% |
| Never Married | 17.8% | 19.7% | 33.8% |
| Divorced | 6.3% | 7.6% | 10.8% |
| Widowed | 5.8% | 5.9% | 5.6% |
| space5 | | | |
| Household Size | 2.69 | 2.61 | 2.60 |
| Households | 2,646 | 3,146 | 124,010,992 |
| Family Households | 2,238 | 2,230 | 80,755,759 |
| Married couple, w/children | 38.2% | 42.9% | 30.5% |
| Married couple, no children | 44.9% | 46.1% | 42.9% |
| Non Family Households | 408 | 916 | 43,255,233 |
| Single householder, w/children | 9.5% | 8.7% | 15.8% |
| Single householder, no children | 7.3% | 2.3% | 10.8% |