| PEOPLE | Leavenworth | Lewiston | United States |
| Population | 35,251 | 31,894 | 308,035,306 |
| Pop. Density | 1,466 | 1,851 | 87 |
| Pop. Change | -0.23% | 4.92% | 8.07% |
| Median Age | 34.8 | 39.9 | 37.3 |
| Households | 12,256 | 13,324 | 116,716,292 |
| Household Size | 2.55 | 2.33 | 2.58 |
| Male Population | 53.87% | 49.18% | 49.27% |
| Female Population | 46.13% | 50.82% | 50.96% |
| Married Population | 42.74% | 52.10% | 47.02% |
| Single Population | 57.26% | 47.90% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 8.11% | 5.71% | 6.56% |
| Age 5 to 9 | 7.68% | 5.87% | 6.61% |
| Age 10 to 14 | 6.57% | 6.09% | 6.71% |
| Age 15 to 17 | 3.61% | 3.86% | 4.21% |
| Age 18 to 20 | 2.23% | 3.23% | 2.95% |
| Age 21 to 24 | 6.29% | 7.55% | 7.01% |
| Age 25 to 34 | 15.85% | 12.23% | 13.33% |
| Age 35 to 44 | 15.77% | 11.61% | 13.33% |
| Age 45 to 49 | 13.70% | 13.61% | 14.61% |
| Age 50 to 54 | 13.70% | 13.61% | 14.61% |
| Age 55 to 59 | 10.18% | 12.00% | 11.84% |
| Age 60 to 64 | 10.18% | 12.00% | 11.84% |
| Age 65 to 74 | 5.43% | 8.35% | 7.05% |
| Age 75 to 84 | 3.24% | 6.43% | 4.24% |
| Age 85 and over | 1.34% | 3.46% | 1.78% |
| RACE | | | |
| White | 75.39% | 93.88% | 72.41% |
| Black | 15.14% | 0.33% | 12.61% |
| Asian | 1.76% | 0.80% | 4.75% |
| American Indian | 0.86% | 1.74% | 0.95% |
| Other | 6.85% | 3.25% | 9.28% |
| Hispanic | 2.97% | 1.59% | 16.35% |
| Non-Hispanic | 97.03% | 98.41% | 83.65% |
| FAMILY | | | |
| Married, w/children | 35.10% | 26.72% | 30.42% |
| Married, no children | 38.37% | 49.63% | 42.46% |
| Single, w/children | 17.12% | 14.10% | 14.39% |
| Single, no children | 9.41% | 9.56% | 12.73% |
| Divorced | 15.97% | 12.31% | 10.62% |
| Separated | 6.89% | 3.09% | 4.97% |
| Widowed | 6.59% | 7.76% | 6.14% |
| Now Married | 42.87% | 51.35% | 46.32% |
| Never Married | 27.67% | 25.49% | 31.95% |
