| | Kettle Falls, WA | Tonasket, WA | United States |
| Population | 1,617 | 980 | 329,725,481 |
| Female Population | 49.5% | 49.3% | 50.5% |
| Male Population | 50.5% | 50.7% | 49.5% |
| Median Age | 44 | 47.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,587 | 1,147 | 309,327,143 |
| Population - 2000 | 1,527 | 994 | 285,036,114 |
| Population - 1990 | 1,272 | 847 | 251,960,433 |
| Pop. 2000 to Now | 7.5% | 13.8% | 15.6% |
| Pop. 1990 to Now | 29.0% | 33.5% | 30.8% |
| space4 | | | |
| Population Density | 1,522.6 | 1,034.9 | 93.4 |
| Land Area | 1.1 | 0.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Kettle Falls, WA | Tonasket, WA | United States |
| Age 0 to 4 | 7.7% | 5.3% | 5.9% |
| Age 5 to 9 | 7.4% | 7.7% | 6.1% |
| Age 10 to 14 | 5.5% | 3.4% | 6.6% |
| Age 15 to 17 | 2.8% | 2.4% | 3.9% |
| Age 18 to 20 | 1.7% | 3.6% | 4.0% |
| Age 21 to 24 | 5.9% | 1.0% | 5.2% |
| Age 25 to 34 | 9.5% | 10.2% | 13.8% |
| Age 35 to 44 | 11.1% | 11.2% | 12.9% |
| Age 45 to 54 | 14.7% | 18.7% | 12.6% |
| Age 55 to 59 | 6.2% | 7.3% | 6.7% |
| Age 60 to 64 | 7.9% | 6.6% | 6.3% |
| Age 65 to 74 | 13.2% | 10.1% | 9.6% |
| Age 75 to 84 | 3.8% | 6.8% | 4.5% |
| Age 85 and over | 2.5% | 5.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Kettle Falls, WA | Tonasket, WA | United States |
| White | 85.3% | 72.2% | 59.4% |
| Black | 0.6% | 0.0% | 12.2% |
| Asian | 0.1% | 0.0% | 5.6% |
| Native American | 0.8% | 1.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.5% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 10.9% | 12.8% | 3.2% |
| Hispanic | 2.4% | 13.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Kettle Falls, WA | Tonasket, WA | United States |
| Married Population | 39.4% | 53.7% | 49.8% |
| Currently Married | 37.8% | 47.6% | 48.0% |
| Married but Separated | 1.6% | 6.1% | 1.8% |
| Single Population | 60.6% | 46.3% | 50.2% |
| Never Married | 27.4% | 15.2% | 33.8% |
| Divorced | 25.1% | 19.0% | 10.8% |
| Widowed | 8.1% | 12.1% | 5.6% |
| space5 | | | |
| Household Size | 2.17 | 2.14 | 2.60 |
| Households | 740 | 433 | 124,010,992 |
| Family Households | 372 | 216 | 80,755,759 |
| Married couple, w/children | 28.2% | 32.9% | 30.5% |
| Married couple, no children | 36.0% | 48.6% | 42.9% |
| Non Family Households | 368 | 217 | 43,255,233 |
| Single householder, w/children | 20.2% | 16.2% | 15.8% |
| Single householder, no children | 15.6% | 2.3% | 10.8% |