| | Omak, WA | Yaak, MT | United States |
| Population | 4,854 | 251 | 321,418,820 |
| Population - 2010 | 4,762 | 161 | 308,745,538 |
| Population - 2000 | 4,721 | 242 | 285,036,114 |
| Population - 1990 | 4,117 | 210 | 251,960,433 |
| Pop. 1990 to Now | 17.90% | 19.52% | 27.57% |
| Pop. 2000 to Now | 2.82% | 3.72% | 12.76% |
| Pop. Density | 1,403 | 9 | 91 |
| Land Area | 3 | 28 | 3,531,905 |
| Water Area | 0 | 0 | 264,837 |
| Median Age | 38.1 | 58.8 | 37.4 |
| Female Population | 50.65% | 47.01% | 50.81% |
| Male Population | 49.35% | 52.99% | 49.19% |
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| EST. TOTAL POPULATION BY AGE | | | |
| | Omak, WA | Yaak, MT | United States |
| Age 0 to 4 | 7.03% | 0.00% | 6.36% |
| Age 5 to 9 | 5.01% | 2.39% | 6.51% |
| Age 10 to 14 | 7.67% | 3.59% | 6.59% |
| Age 15 to 17 | 2.94% | 0.00% | 4.03% |
| Age 18 to 20 | 3.21% | 0.00% | 4.35% |
| Age 21 to 24 | 5.21% | 4.38% | 5.61% |
| Age 25 to 34 | 15.47% | 4.38% | 13.47% |
| Age 35 to 44 | 10.22% | 6.38% | 12.97% |
| Age 45 to 54 | 11.73% | 14.74% | 14.09% |
| Age 55 to 59 | 8.13% | 20.32% | 6.57% |
| Age 60 to 64 | 4.14% | 5.58% | 5.72% |
| Age 65 to 74 | 10.42% | 34.26% | 7.64% |
| Age 75 to 84 | 4.63% | 3.59% | 4.26% |
| Age 85 and over | 4.20% | 0.40% | 1.85% |
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| RACE | | | |
| | Omak, WA | Yaak, MT | United States |
| White | 65.38% | 93.63% | 62.77% |
| Black | 0.12% | 0.00% | 12.24% |
| Asian | 2.17% | 0.00% | 4.95% |
| Native American | 13.01% | 0.80% | 0.66% |
| Hawaiian, Pacific Islander | 0.00% | 0.00% | 0.16% |
| Other | 0.00% | 0.00% | 0.20% |
| Two or More Races | 4.12% | 0.80% | 2.13% |
| Hispanic | 15.20% | 4.78% | 16.90% |
| Non-Hispanic | 84.80% | 95.22% | 83.10% |
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| FAMILY | | | |
| | Omak, WA | Yaak, MT | United States |
| Households | 1,910 | 132 | 116,211,000 |
| Family Households | 1,215 | 86 | 76,958,100 |
| Non Family Households | 695 | 46 | 39,253,000 |
| Household Size | 2.5 | 1.9 | 2.63 |
| Married Population | 47.40% | 62.71% | 50.58% |
| Single Population | 52.60% | 37.29% | 49.42% |
| Now Married | 47.01% | 61.02% | 48.41% |
| Married but Separated | 0.39% | 1.70% | 2.17% |
| Never Married | 29.21% | 10.17% | 32.55% |
| Widowed | 9.45% | 0.42% | 5.95% |
| Divorced | 13.94% | 26.70% | 10.92% |
| Married, w/children | 27.33% | 5.81% | 31.68% |
| Married, no children | 41.73% | 76.74% | 41.44% |
| Single, w/children | 23.46% | 1.16% | 16.94% |
| Single, no children | 7.49% | 16.28% | 9.95% |