| | Plainville, MA | Franklin Town, MA | United States |
| Population | 9,760 | 33,057 | 329,725,481 |
| Female Population | 49.6% | 52.2% | 50.5% |
| Male Population | 50.4% | 47.8% | 49.5% |
| Median Age | 44.3 | 41 | 38.4 |
| space3 | | | |
| Population - 2010 | 8,304 | 31,846 | 309,327,143 |
| Population - 2000 | 7,683 | 29,560 | 285,036,114 |
| Population - 1990 | 6,871 | 22,111 | 251,960,433 |
| Pop. 2000 to Now | 20.8% | 17.4% | 15.6% |
| Pop. 1990 to Now | 35.1% | 57.0% | 30.8% |
| space4 | | | |
| Population Density | 887.5 | 1,240.9 | 93.4 |
| Land Area | 11.0 | 26.6 | 3,531,905.4 |
| Water Area | 0.5 | 0.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Plainville, MA | Franklin Town, MA | United States |
| Age 0 to 4 | 4.4% | 4.1% | 5.9% |
| Age 5 to 9 | 4.9% | 4.9% | 6.1% |
| Age 10 to 14 | 5.6% | 7.6% | 6.6% |
| Age 15 to 17 | 3.4% | 5.2% | 3.9% |
| Age 18 to 20 | 2.3% | 6.3% | 4.0% |
| Age 21 to 24 | 4.4% | 5.0% | 5.2% |
| Age 25 to 34 | 14.5% | 10.4% | 13.8% |
| Age 35 to 44 | 12.0% | 11.4% | 12.9% |
| Age 45 to 54 | 14.4% | 17.8% | 12.6% |
| Age 55 to 59 | 7.7% | 7.9% | 6.7% |
| Age 60 to 64 | 6.1% | 6.2% | 6.3% |
| Age 65 to 74 | 14.2% | 8.2% | 9.6% |
| Age 75 to 84 | 5.0% | 3.4% | 4.5% |
| Age 85 and over | 0.9% | 1.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Plainville, MA | Franklin Town, MA | United States |
| White | 87.7% | 86.2% | 59.4% |
| Black | 0.6% | 1.7% | 12.2% |
| Asian | 2.4% | 6.2% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.5% | 0.2% | 0.4% |
| Two or More Races | 1.4% | 2.0% | 3.2% |
| Hispanic | 6.4% | 3.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Plainville, MA | Franklin Town, MA | United States |
| Married Population | 54.9% | 57.8% | 49.8% |
| Currently Married | 54.7% | 56.4% | 48.0% |
| Married but Separated | 0.3% | 1.4% | 1.8% |
| Single Population | 45.1% | 42.2% | 50.2% |
| Never Married | 29.3% | 30.9% | 33.8% |
| Divorced | 10.2% | 6.9% | 10.8% |
| Widowed | 5.6% | 4.4% | 5.6% |
| space5 | | | |
| Household Size | 2.35 | 2.63 | 2.60 |
| Households | 4,144 | 12,118 | 124,010,992 |
| Family Households | 2,912 | 8,914 | 80,755,759 |
| Married couple, w/children | 25.8% | 39.9% | 30.5% |
| Married couple, no children | 52.2% | 43.8% | 42.9% |
| Non Family Households | 1,232 | 3,204 | 43,255,233 |
| Single householder, w/children | 12.5% | 10.2% | 15.8% |
| Single householder, no children | 9.4% | 6.1% | 10.8% |