| PEOPLE | Kirkland | Mesa | United States |
| Population | 48,787 | 439,041 | 308,035,306 |
| Pop. Density | 4,523 | 3,218 | 87 |
| Pop. Change | 9.98% | 5.44% | 8.07% |
| Median Age | 37.4 | 34.7 | 37.3 |
| Households | 22,445 | 165,374 | 116,716,292 |
| Household Size | 2.17 | 2.61 | 2.58 |
| Male Population | 48.67% | 49.18% | 49.27% |
| Female Population | 51.33% | 50.82% | 50.96% |
| Married Population | 45.20% | 45.75% | 47.02% |
| Single Population | 54.80% | 54.25% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 6.02% | 7.69% | 6.56% |
| Age 5 to 9 | 5.30% | 7.30% | 6.61% |
| Age 10 to 14 | 4.70% | 7.08% | 6.71% |
| Age 15 to 17 | 2.74% | 4.20% | 4.21% |
| Age 18 to 20 | 1.96% | 2.86% | 2.95% |
| Age 21 to 24 | 6.28% | 7.17% | 7.01% |
| Age 25 to 34 | 19.01% | 14.16% | 13.33% |
| Age 35 to 44 | 16.10% | 12.57% | 13.33% |
| Age 45 to 49 | 15.13% | 12.59% | 14.61% |
| Age 50 to 54 | 15.13% | 12.59% | 14.61% |
| Age 55 to 59 | 11.90% | 10.32% | 11.84% |
| Age 60 to 64 | 11.90% | 10.32% | 11.84% |
| Age 65 to 74 | 5.77% | 7.29% | 7.05% |
| Age 75 to 84 | 3.31% | 4.78% | 4.24% |
| Age 85 and over | 1.79% | 1.99% | 1.78% |
| RACE | | | |
| White | 79.31% | 77.12% | 72.41% |
| Black | 1.75% | 3.48% | 12.61% |
| Asian | 11.25% | 1.93% | 4.75% |
| American Indian | 0.41% | 2.36% | 0.95% |
| Other | 7.27% | 15.10% | 9.28% |
| Hispanic | 3.26% | 1.23% | 16.35% |
| Non-Hispanic | 96.74% | 98.77% | 83.65% |
| FAMILY | | | |
| Married, w/children | 32.97% | 30.03% | 30.42% |
| Married, no children | 46.06% | 42.05% | 42.46% |
| Single, w/children | 10.87% | 15.81% | 14.39% |
| Single, no children | 10.10% | 12.11% | 12.73% |
| Divorced | 15.57% | 12.01% | 10.62% |
| Separated | 3.30% | 4.25% | 4.97% |
| Widowed | 4.03% | 6.35% | 6.14% |
| Now Married | 45.26% | 46.13% | 46.32% |
| Never Married | 31.84% | 31.26% | 31.95% |
