| | Warrenton, OR | Chelsea, MA | United States |
| Population | 6,123 | 40,025 | 329,725,481 |
| Female Population | 51.4% | 48.8% | 50.5% |
| Male Population | 48.6% | 51.3% | 49.5% |
| Median Age | 35.6 | 33.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 5,033 | 35,344 | 309,327,143 |
| Population - 2000 | 4,096 | 35,080 | 285,036,114 |
| Population - 1990 | 2,681 | 28,710 | 251,960,433 |
| Pop. 2000 to Now | 40.1% | 11.8% | 15.6% |
| Pop. 1990 to Now | 114.1% | 36.6% | 30.8% |
| space4 | | | |
| Population Density | 483.8 | 18,070.0 | 93.4 |
| Land Area | 12.7 | 2.2 | 3,531,905.4 |
| Water Area | 4.4 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Warrenton, OR | Chelsea, MA | United States |
| Age 0 to 4 | 3.9% | 8.5% | 5.9% |
| Age 5 to 9 | 6.3% | 5.5% | 6.1% |
| Age 10 to 14 | 9.1% | 7.2% | 6.6% |
| Age 15 to 17 | 5.2% | 4.1% | 3.9% |
| Age 18 to 20 | 4.4% | 3.5% | 4.0% |
| Age 21 to 24 | 4.1% | 4.9% | 5.2% |
| Age 25 to 34 | 16.2% | 18.9% | 13.8% |
| Age 35 to 44 | 13.1% | 15.8% | 12.9% |
| Age 45 to 54 | 8.6% | 11.7% | 12.6% |
| Age 55 to 59 | 4.2% | 5.3% | 6.7% |
| Age 60 to 64 | 5.7% | 5.1% | 6.3% |
| Age 65 to 74 | 12.3% | 5.4% | 9.6% |
| Age 75 to 84 | 5.1% | 2.5% | 4.5% |
| Age 85 and over | 1.9% | 1.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Warrenton, OR | Chelsea, MA | United States |
| White | 78.4% | 19.7% | 59.4% |
| Black | 0.2% | 7.0% | 12.2% |
| Asian | 2.3% | 3.5% | 5.6% |
| Native American | 0.3% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.8% | 0.0% | 0.2% |
| Other | 0.0% | 0.4% | 0.4% |
| Two or More Races | 9.5% | 3.3% | 3.2% |
| Hispanic | 8.5% | 66.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Warrenton, OR | Chelsea, MA | United States |
| Married Population | 49.6% | 41.5% | 49.8% |
| Currently Married | 48.5% | 36.9% | 48.0% |
| Married but Separated | 1.2% | 4.6% | 1.8% |
| Single Population | 50.4% | 58.5% | 50.2% |
| Never Married | 26.4% | 44.7% | 33.8% |
| Divorced | 17.8% | 8.4% | 10.8% |
| Widowed | 6.2% | 5.5% | 5.6% |
| space5 | | | |
| Household Size | 2.69 | 2.94 | 2.60 |
| Households | 2,241 | 13,353 | 124,010,992 |
| Family Households | 1,482 | 7,470 | 80,755,759 |
| Married couple, w/children | 30.5% | 34.0% | 30.5% |
| Married couple, no children | 43.6% | 26.6% | 42.9% |
| Non Family Households | 759 | 5,883 | 43,255,233 |
| Single householder, w/children | 15.5% | 25.3% | 15.8% |
| Single householder, no children | 10.5% | 14.1% | 10.8% |