| | Charlton, MA | Clayton, NJ | United States |
| Population | 13,312 | 8,818 | 329,725,481 |
| Female Population | 51.3% | 52.7% | 50.5% |
| Male Population | 48.7% | 47.3% | 49.5% |
| Median Age | 41.1 | 39.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 13,007 | 8,186 | 309,327,143 |
| Population - 2000 | 11,263 | 7,139 | 285,036,114 |
| Population - 1990 | 9,576 | 6,155 | 251,960,433 |
| Pop. 2000 to Now | 21.6% | 22.7% | 15.6% |
| Pop. 1990 to Now | 43.1% | 42.3% | 30.8% |
| space4 | | | |
| Population Density | 315.6 | 1,246.4 | 93.4 |
| Land Area | 42.2 | 7.1 | 3,531,905.4 |
| Water Area | 1.6 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Charlton, MA | Clayton, NJ | United States |
| Age 0 to 4 | 5.2% | 3.7% | 5.9% |
| Age 5 to 9 | 7.2% | 10.7% | 6.1% |
| Age 10 to 14 | 9.0% | 4.1% | 6.6% |
| Age 15 to 17 | 3.5% | 5.2% | 3.9% |
| Age 18 to 20 | 3.4% | 2.9% | 4.0% |
| Age 21 to 24 | 3.5% | 6.7% | 5.2% |
| Age 25 to 34 | 9.7% | 11.0% | 13.8% |
| Age 35 to 44 | 12.1% | 13.0% | 12.9% |
| Age 45 to 54 | 14.8% | 14.2% | 12.6% |
| Age 55 to 59 | 8.6% | 6.0% | 6.7% |
| Age 60 to 64 | 7.8% | 4.4% | 6.3% |
| Age 65 to 74 | 9.4% | 13.9% | 9.6% |
| Age 75 to 84 | 3.0% | 2.9% | 4.5% |
| Age 85 and over | 2.8% | 1.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Charlton, MA | Clayton, NJ | United States |
| White | 90.8% | 61.1% | 59.4% |
| Black | 0.7% | 25.4% | 12.2% |
| Asian | 0.3% | 0.2% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.0% | 0.4% |
| Two or More Races | 2.7% | 2.4% | 3.2% |
| Hispanic | 5.5% | 10.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Charlton, MA | Clayton, NJ | United States |
| Married Population | 61.1% | 43.9% | 49.8% |
| Currently Married | 58.6% | 41.2% | 48.0% |
| Married but Separated | 2.5% | 2.7% | 1.8% |
| Single Population | 38.9% | 56.1% | 50.2% |
| Never Married | 24.1% | 40.0% | 33.8% |
| Divorced | 9.7% | 10.1% | 10.8% |
| Widowed | 5.0% | 6.0% | 5.6% |
| space5 | | | |
| Household Size | 2.76 | 2.86 | 2.60 |
| Households | 4,776 | 3,065 | 124,010,992 |
| Family Households | 3,720 | 2,372 | 80,755,759 |
| Married couple, w/children | 34.3% | 16.3% | 30.5% |
| Married couple, no children | 43.4% | 44.6% | 42.9% |
| Non Family Households | 1,056 | 693 | 43,255,233 |
| Single householder, w/children | 14.4% | 27.7% | 15.8% |
| Single householder, no children | 7.9% | 11.5% | 10.8% |