| | Sunderland, MA | Stockbridge, MA | United States |
| Population | 3,667 | 1,827 | 329,725,481 |
| Female Population | 50.5% | 57.3% | 50.5% |
| Male Population | 49.5% | 42.8% | 49.5% |
| Median Age | 34.5 | 60.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,690 | 1,943 | 309,327,143 |
| Population - 2000 | 3,777 | 2,276 | 285,036,114 |
| Population - 1990 | 3,399 | 2,408 | 251,960,433 |
| Pop. 2000 to Now | -3.8% | -17.3% | 15.6% |
| Pop. 1990 to Now | 6.9% | -21.8% | 30.8% |
| space4 | | | |
| Population Density | 257.7 | 80.4 | 93.4 |
| Land Area | 14.2 | 22.7 | 3,531,905.4 |
| Water Area | 0.5 | 0.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sunderland, MA | Stockbridge, MA | United States |
| Age 0 to 4 | 2.5% | 1.8% | 5.9% |
| Age 5 to 9 | 1.4% | 1.4% | 6.1% |
| Age 10 to 14 | 4.3% | 4.4% | 6.6% |
| Age 15 to 17 | 1.6% | 1.9% | 3.9% |
| Age 18 to 20 | 2.8% | 2.5% | 4.0% |
| Age 21 to 24 | 16.9% | 6.2% | 5.2% |
| Age 25 to 34 | 22.0% | 6.2% | 13.8% |
| Age 35 to 44 | 10.8% | 6.8% | 12.9% |
| Age 45 to 54 | 9.0% | 9.3% | 12.6% |
| Age 55 to 59 | 7.6% | 9.4% | 6.7% |
| Age 60 to 64 | 6.4% | 9.5% | 6.3% |
| Age 65 to 74 | 6.4% | 26.4% | 9.6% |
| Age 75 to 84 | 5.3% | 9.6% | 4.5% |
| Age 85 and over | 3.0% | 4.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sunderland, MA | Stockbridge, MA | United States |
| White | 80.4% | 87.6% | 59.4% |
| Black | 0.0% | 3.7% | 12.2% |
| Asian | 11.9% | 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 | 1.9% | 1.4% | 3.2% |
| Hispanic | 5.8% | 4.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sunderland, MA | Stockbridge, MA | United States |
| Married Population | 36.4% | 41.1% | 49.8% |
| Currently Married | 32.7% | 39.8% | 48.0% |
| Married but Separated | 3.7% | 1.3% | 1.8% |
| Single Population | 63.6% | 58.9% | 50.2% |
| Never Married | 53.2% | 34.8% | 33.8% |
| Divorced | 5.7% | 17.0% | 10.8% |
| Widowed | 4.6% | 7.1% | 5.6% |
| space5 | | | |
| Household Size | 2.17 | 2.02 | 2.60 |
| Households | 1,666 | 811 | 124,010,992 |
| Family Households | 773 | 453 | 80,755,759 |
| Married couple, w/children | 20.4% | 17.9% | 30.5% |
| Married couple, no children | 47.3% | 59.4% | 42.9% |
| Non Family Households | 893 | 358 | 43,255,233 |
| Single householder, w/children | 5.6% | 5.3% | 15.8% |
| Single householder, no children | 26.6% | 17.4% | 10.8% |