| | Hamilton, WA | Gold Bar, WA | United States |
| Population | 326 | 2,172 | 329,725,481 |
| Female Population | 48.5% | 45.9% | 50.5% |
| Male Population | 51.5% | 54.1% | 49.5% |
| Median Age | 54.5 | 38.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 301 | 2,165 | 309,327,143 |
| Population - 2000 | 309 | 2,014 | 285,036,114 |
| Population - 1990 | 228 | 1,078 | 251,960,433 |
| Pop. 2000 to Now | 0.3% | 18.4% | 15.6% |
| Pop. 1990 to Now | 36.0% | 121.2% | 30.8% |
| space4 | | | |
| Population Density | 289.5 | 2,016.7 | 93.4 |
| Land Area | 1.1 | 1.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Hamilton, WA | Gold Bar, WA | United States |
| Age 0 to 4 | 1.5% | 5.6% | 5.9% |
| Age 5 to 9 | 2.5% | 8.2% | 6.1% |
| Age 10 to 14 | 3.1% | 6.2% | 6.6% |
| Age 15 to 17 | 6.7% | 4.2% | 3.9% |
| Age 18 to 20 | 2.8% | 1.8% | 4.0% |
| Age 21 to 24 | 0.0% | 4.1% | 5.2% |
| Age 25 to 34 | 8.9% | 15.1% | 13.8% |
| Age 35 to 44 | 10.1% | 11.7% | 12.9% |
| Age 45 to 54 | 23.3% | 15.3% | 12.6% |
| Age 55 to 59 | 18.4% | 9.5% | 6.7% |
| Age 60 to 64 | 4.3% | 7.1% | 6.3% |
| Age 65 to 74 | 13.2% | 8.2% | 9.6% |
| Age 75 to 84 | 4.9% | 2.7% | 4.5% |
| Age 85 and over | 0.3% | 0.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Hamilton, WA | Gold Bar, WA | United States |
| White | 83.4% | 81.2% | 59.4% |
| Black | 0.0% | 4.8% | 12.2% |
| Asian | 3.4% | 0.3% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 5.2% | 3.7% | 3.2% |
| Hispanic | 8.0% | 10.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Hamilton, WA | Gold Bar, WA | United States |
| Married Population | 54.8% | 57.6% | 49.8% |
| Currently Married | 54.8% | 56.2% | 48.0% |
| Married but Separated | 0.0% | 1.4% | 1.8% |
| Single Population | 45.2% | 42.4% | 50.2% |
| Never Married | 17.5% | 25.8% | 33.8% |
| Divorced | 16.8% | 12.3% | 10.8% |
| Widowed | 10.9% | 4.2% | 5.6% |
| space5 | | | |
| Household Size | 1.96 | 2.62 | 2.60 |
| Households | 166 | 830 | 124,010,992 |
| Family Households | 115 | 552 | 80,755,759 |
| Married couple, w/children | 6.1% | 37.7% | 30.5% |
| Married couple, no children | 60.9% | 42.6% | 42.9% |
| Non Family Households | 51 | 278 | 43,255,233 |
| Single householder, w/children | 25.2% | 7.8% | 15.8% |
| Single householder, no children | 7.8% | 12.0% | 10.8% |