| PEOPLE | Kirkland | Cottage Lake | United States |
| Population | 48,787 | 22,494 | 308,035,306 |
| Pop. Density | 4,523 | 993 | 87 |
| Pop. Change | 9.98% | -5.59% | 8.07% |
| Median Age | 37.4 | 43.1 | 37.3 |
| Households | 22,445 | 7,674 | 116,716,292 |
| Household Size | 2.17 | 2.92 | 2.58 |
| Male Population | 48.67% | 50.92% | 49.27% |
| Female Population | 51.33% | 49.08% | 50.96% |
| Married Population | 45.20% | 67.82% | 47.02% |
| Single Population | 54.80% | 32.18% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 6.02% | 4.57% | 6.56% |
| Age 5 to 9 | 5.30% | 7.21% | 6.61% |
| Age 10 to 14 | 4.70% | 8.94% | 6.71% |
| Age 15 to 17 | 2.74% | 6.00% | 4.21% |
| Age 18 to 20 | 1.96% | 2.67% | 2.95% |
| Age 21 to 24 | 6.28% | 3.87% | 7.01% |
| Age 25 to 34 | 19.01% | 6.01% | 13.33% |
| Age 35 to 44 | 16.10% | 13.90% | 13.33% |
| Age 45 to 49 | 15.13% | 21.79% | 14.61% |
| Age 50 to 54 | 15.13% | 21.79% | 14.61% |
| Age 55 to 59 | 11.90% | 16.82% | 11.84% |
| Age 60 to 64 | 11.90% | 16.82% | 11.84% |
| Age 65 to 74 | 5.77% | 5.68% | 7.05% |
| Age 75 to 84 | 3.31% | 1.88% | 4.24% |
| Age 85 and over | 1.79% | 0.65% | 1.78% |
| RACE | | | |
| White | 79.31% | 89.05% | 72.41% |
| Black | 1.75% | 0.70% | 12.61% |
| Asian | 11.25% | 5.26% | 4.75% |
| American Indian | 0.41% | 0.38% | 0.95% |
| Other | 7.27% | 4.61% | 9.28% |
| Hispanic | 3.26% | 8.00% | 16.35% |
| Non-Hispanic | 96.74% | 92.00% | 83.65% |
| FAMILY | | | |
| Married, w/children | 32.97% | 42.16% | 30.42% |
| Married, no children | 46.06% | 48.23% | 42.46% |
| Single, w/children | 10.87% | 5.01% | 14.39% |
| Single, no children | 10.10% | 4.60% | 12.73% |
| Divorced | 15.57% | 5.07% | 10.62% |
| Separated | 3.30% | 2.20% | 4.97% |
| Widowed | 4.03% | 2.62% | 6.14% |
| Now Married | 45.26% | 68.82% | 46.32% |
| Never Married | 31.84% | 21.29% | 31.95% |
