| | Carlisle, MA | Acton, MA | United States |
| Population | 5,215 | 23,899 | 329,725,481 |
| Female Population | 46.5% | 53.0% | 50.5% |
| Male Population | 53.5% | 47.0% | 49.5% |
| Median Age | 45.7 | 43.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,870 | 21,983 | 309,327,143 |
| Population - 2000 | 4,717 | 20,331 | 285,036,114 |
| Population - 1990 | 4,333 | 17,872 | 251,960,433 |
| Pop. 2000 to Now | 10.9% | 15.6% | 15.6% |
| Pop. 1990 to Now | 20.7% | 31.5% | 30.8% |
| space4 | | | |
| Population Density | 341.6 | 1,203.1 | 93.4 |
| Land Area | 15.3 | 19.9 | 3,531,905.4 |
| Water Area | 0.2 | 0.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Carlisle, MA | Acton, MA | United States |
| Age 0 to 4 | 5.3% | 4.6% | 5.9% |
| Age 5 to 9 | 7.8% | 6.9% | 6.1% |
| Age 10 to 14 | 7.9% | 7.6% | 6.6% |
| Age 15 to 17 | 4.7% | 6.9% | 3.9% |
| Age 18 to 20 | 2.2% | 2.6% | 4.0% |
| Age 21 to 24 | 4.0% | 3.3% | 5.2% |
| Age 25 to 34 | 4.4% | 6.8% | 13.8% |
| Age 35 to 44 | 12.8% | 14.1% | 12.9% |
| Age 45 to 54 | 14.3% | 17.5% | 12.6% |
| Age 55 to 59 | 7.3% | 9.1% | 6.7% |
| Age 60 to 64 | 9.3% | 4.7% | 6.3% |
| Age 65 to 74 | 14.7% | 9.2% | 9.6% |
| Age 75 to 84 | 3.8% | 4.3% | 4.5% |
| Age 85 and over | 1.6% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Carlisle, MA | Acton, MA | United States |
| White | 85.0% | 63.4% | 59.4% |
| Black | 0.0% | 4.2% | 12.2% |
| Asian | 10.7% | 23.6% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.5% | 0.4% |
| Two or More Races | 2.7% | 4.7% | 3.2% |
| Hispanic | 1.6% | 3.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Carlisle, MA | Acton, MA | United States |
| Married Population | 66.8% | 63.3% | 49.8% |
| Currently Married | 66.8% | 63.0% | 48.0% |
| Married but Separated | 0.0% | 0.3% | 1.8% |
| Single Population | 33.2% | 36.7% | 50.2% |
| Never Married | 22.0% | 25.4% | 33.8% |
| Divorced | 7.2% | 6.6% | 10.8% |
| Widowed | 4.0% | 4.6% | 5.6% |
| space5 | | | |
| Household Size | 2.90 | 2.66 | 2.60 |
| Households | 1,800 | 8,931 | 124,010,992 |
| Family Households | 1,411 | 6,643 | 80,755,759 |
| Married couple, w/children | 38.8% | 46.5% | 30.5% |
| Married couple, no children | 53.2% | 40.1% | 42.9% |
| Non Family Households | 389 | 2,288 | 43,255,233 |
| Single householder, w/children | 5.2% | 8.3% | 15.8% |
| Single householder, no children | 2.9% | 5.0% | 10.8% |