| | Grafton, MA | Lincoln, RI | United States |
| Population | 19,540 | 22,415 | 329,725,481 |
| Female Population | 49.7% | 50.9% | 50.5% |
| Male Population | 50.3% | 49.1% | 49.5% |
| Median Age | 40.3 | 43 | 38.4 |
| space3 | | | |
| Population - 2010 | 18,035 | 21,091 | 309,327,143 |
| Population - 2000 | 14,894 | 20,898 | 285,036,114 |
| Population - 1990 | 13,035 | 18,045 | 251,960,433 |
| Pop. 2000 to Now | 28.1% | 5.0% | 15.6% |
| Pop. 1990 to Now | 46.4% | 21.6% | 30.8% |
| space4 | | | |
| Population Density | 856.5 | 1,237.0 | 93.4 |
| Land Area | 22.8 | 18.1 | 3,531,905.4 |
| Water Area | 0.5 | 0.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Grafton, MA | Lincoln, RI | United States |
| Age 0 to 4 | 5.8% | 6.2% | 5.9% |
| Age 5 to 9 | 4.7% | 5.7% | 6.1% |
| Age 10 to 14 | 7.5% | 6.6% | 6.6% |
| Age 15 to 17 | 4.8% | 4.1% | 3.9% |
| Age 18 to 20 | 4.3% | 3.0% | 4.0% |
| Age 21 to 24 | 4.3% | 4.9% | 5.2% |
| Age 25 to 34 | 12.2% | 11.4% | 13.8% |
| Age 35 to 44 | 11.8% | 11.7% | 12.9% |
| Age 45 to 54 | 17.6% | 13.3% | 12.6% |
| Age 55 to 59 | 8.2% | 7.1% | 6.7% |
| Age 60 to 64 | 5.3% | 6.2% | 6.3% |
| Age 65 to 74 | 7.8% | 10.1% | 9.6% |
| Age 75 to 84 | 3.7% | 6.9% | 4.5% |
| Age 85 and over | 1.9% | 2.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Grafton, MA | Lincoln, RI | United States |
| White | 74.4% | 83.3% | 59.4% |
| Black | 2.1% | 1.3% | 12.2% |
| Asian | 9.4% | 5.6% | 5.6% |
| Native American | 0.6% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.4% | 1.3% | 0.4% |
| Two or More Races | 5.2% | 4.0% | 3.2% |
| Hispanic | 6.9% | 4.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Grafton, MA | Lincoln, RI | United States |
| Married Population | 54.0% | 48.4% | 49.8% |
| Currently Married | 52.8% | 47.2% | 48.0% |
| Married but Separated | 1.1% | 1.2% | 1.8% |
| Single Population | 46.0% | 51.6% | 50.2% |
| Never Married | 29.9% | 30.6% | 33.8% |
| Divorced | 11.5% | 12.2% | 10.8% |
| Widowed | 4.6% | 8.8% | 5.6% |
| space5 | | | |
| Household Size | 2.57 | 2.67 | 2.60 |
| Households | 7,468 | 8,304 | 124,010,992 |
| Family Households | 4,930 | 5,554 | 80,755,759 |
| Married couple, w/children | 41.4% | 34.4% | 30.5% |
| Married couple, no children | 42.2% | 39.3% | 42.9% |
| Non Family Households | 2,538 | 2,750 | 43,255,233 |
| Single householder, w/children | 8.1% | 14.6% | 15.8% |
| Single householder, no children | 8.2% | 11.7% | 10.8% |