| | Wellfleet, MA | Lanesborough, MA | United States |
| Population | 4,305 | 3,043 | 329,725,481 |
| Female Population | 53.4% | 51.5% | 50.5% |
| Male Population | 46.6% | 48.5% | 49.5% |
| Median Age | 54.2 | 52.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,755 | 3,087 | 309,327,143 |
| Population - 2000 | 2,749 | 2,990 | 285,036,114 |
| Population - 1990 | 2,493 | 3,032 | 251,960,433 |
| Pop. 2000 to Now | -0.8% | -2.2% | 15.6% |
| Pop. 1990 to Now | 9.4% | -3.5% | 30.8% |
| space4 | | | |
| Population Density | 217.5 | 105.5 | 93.4 |
| Land Area | 19.8 | 28.8 | 3,531,905.4 |
| Water Area | 15.6 | 0.7 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Wellfleet, MA | Lanesborough, MA | United States |
| Age 0 to 4 | 2.4% | 2.5% | 5.9% |
| Age 5 to 9 | 5.2% | 7.2% | 6.1% |
| Age 10 to 14 | 4.8% | 7.0% | 6.6% |
| Age 15 to 17 | 1.0% | 4.0% | 3.9% |
| Age 18 to 20 | 1.4% | 0.8% | 4.0% |
| Age 21 to 24 | 8.5% | 3.3% | 5.2% |
| Age 25 to 34 | 6.2% | 6.2% | 13.8% |
| Age 35 to 44 | 11.1% | 12.0% | 12.9% |
| Age 45 to 54 | 11.4% | 10.4% | 12.6% |
| Age 55 to 59 | 6.4% | 9.1% | 6.7% |
| Age 60 to 64 | 14.1% | 13.1% | 6.3% |
| Age 65 to 74 | 14.9% | 17.3% | 9.6% |
| Age 75 to 84 | 10.7% | 5.6% | 4.5% |
| Age 85 and over | 1.9% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Wellfleet, MA | Lanesborough, MA | United States |
| White | 85.1% | 98.9% | 59.4% |
| Black | 0.7% | 0.3% | 12.2% |
| Asian | 1.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.1% | 0.5% | 0.4% |
| Two or More Races | 11.0% | 0.4% | 3.2% |
| Hispanic | 1.2% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Wellfleet, MA | Lanesborough, MA | United States |
| Married Population | 48.2% | 51.6% | 49.8% |
| Currently Married | 48.2% | 48.4% | 48.0% |
| Married but Separated | 0.0% | 3.1% | 1.8% |
| Single Population | 51.8% | 48.4% | 50.2% |
| Never Married | 35.8% | 30.3% | 33.8% |
| Divorced | 10.3% | 11.1% | 10.8% |
| Widowed | 5.8% | 7.1% | 5.6% |
| space5 | | | |
| Household Size | 2.47 | 2.22 | 2.60 |
| Households | 1,736 | 1,368 | 124,010,992 |
| Family Households | 1,028 | 846 | 80,755,759 |
| Married couple, w/children | 23.6% | 26.4% | 30.5% |
| Married couple, no children | 60.6% | 44.3% | 42.9% |
| Non Family Households | 708 | 522 | 43,255,233 |
| Single householder, w/children | 6.4% | 23.3% | 15.8% |
| Single householder, no children | 9.3% | 6.0% | 10.8% |