| | New Bedford, MA | Attleboro, MA | United States |
| Population | 100,309 | 46,146 | 329,725,481 |
| Female Population | 50.1% | 50.8% | 50.5% |
| Male Population | 49.9% | 49.2% | 49.5% |
| Median Age | 36.5 | 39.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 95,053 | 43,589 | 309,327,143 |
| Population - 2000 | 93,768 | 42,068 | 285,036,114 |
| Population - 1990 | 99,922 | 38,383 | 251,960,433 |
| Pop. 2000 to Now | 1.9% | 8.0% | 15.6% |
| Pop. 1990 to Now | -4.4% | 18.4% | 30.8% |
| space4 | | | |
| Population Density | 5,016.2 | 1,723.3 | 93.4 |
| Land Area | 20.0 | 26.8 | 3,531,905.4 |
| Water Area | 4.1 | 1.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | New Bedford, MA | Attleboro, MA | United States |
| Age 0 to 4 | 6.7% | 7.1% | 5.9% |
| Age 5 to 9 | 6.2% | 5.4% | 6.1% |
| Age 10 to 14 | 6.2% | 5.8% | 6.6% |
| Age 15 to 17 | 4.3% | 4.2% | 3.9% |
| Age 18 to 20 | 3.7% | 2.6% | 4.0% |
| Age 21 to 24 | 6.3% | 4.5% | 5.2% |
| Age 25 to 34 | 14.7% | 13.9% | 13.8% |
| Age 35 to 44 | 12.9% | 14.2% | 12.9% |
| Age 45 to 54 | 12.5% | 12.9% | 12.6% |
| Age 55 to 59 | 5.7% | 7.6% | 6.7% |
| Age 60 to 64 | 5.5% | 6.6% | 6.3% |
| Age 65 to 74 | 8.9% | 9.2% | 9.6% |
| Age 75 to 84 | 4.0% | 3.9% | 4.5% |
| Age 85 and over | 2.4% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | New Bedford, MA | Attleboro, MA | United States |
| White | 58.0% | 82.4% | 59.4% |
| Black | 5.4% | 3.4% | 12.2% |
| Asian | 1.4% | 2.7% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 5.5% | 0.4% | 0.4% |
| Two or More Races | 6.5% | 3.6% | 3.2% |
| Hispanic | 23.1% | 7.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | New Bedford, MA | Attleboro, MA | United States |
| Married Population | 39.1% | 48.2% | 49.8% |
| Currently Married | 35.6% | 46.7% | 48.0% |
| Married but Separated | 3.5% | 1.5% | 1.8% |
| Single Population | 60.9% | 51.8% | 50.2% |
| Never Married | 42.8% | 31.4% | 33.8% |
| Divorced | 11.9% | 13.2% | 10.8% |
| Widowed | 6.2% | 7.2% | 5.6% |
| space5 | | | |
| Household Size | 2.38 | 2.55 | 2.60 |
| Households | 41,395 | 17,918 | 124,010,992 |
| Family Households | 24,021 | 11,686 | 80,755,759 |
| Married couple, w/children | 22.6% | 32.4% | 30.5% |
| Married couple, no children | 32.9% | 37.2% | 42.9% |
| Non Family Households | 17,374 | 6,232 | 43,255,233 |
| Single householder, w/children | 29.7% | 16.0% | 15.8% |
| Single householder, no children | 14.9% | 14.5% | 10.8% |