| PEOPLE | Sunnyvale | Norwalk | United States |
| Population | 140,081 | 105,549 | 308,035,306 |
| Pop. Density | 6,371 | 10,873 | 87 |
| Pop. Change | 7.47% | 2.53% | 8.07% |
| Median Age | 35.7 | 32.6 | 37.3 |
| Households | 53,384 | 27,130 | 116,716,292 |
| Household Size | 2.61 | 3.83 | 2.58 |
| Male Population | 50.37% | 49.61% | 49.27% |
| Female Population | 49.63% | 50.39% | 50.96% |
| Married Population | 47.30% | 41.76% | 47.02% |
| Single Population | 52.70% | 58.24% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 8.03% | 7.03% | 6.56% |
| Age 5 to 9 | 6.44% | 7.23% | 6.61% |
| Age 10 to 14 | 5.07% | 8.12% | 6.71% |
| Age 15 to 17 | 2.90% | 5.25% | 4.21% |
| Age 18 to 20 | 1.67% | 3.48% | 2.95% |
| Age 21 to 24 | 5.01% | 7.91% | 7.01% |
| Age 25 to 34 | 19.61% | 14.42% | 13.33% |
| Age 35 to 44 | 16.74% | 14.13% | 13.33% |
| Age 45 to 49 | 13.76% | 13.07% | 14.61% |
| Age 50 to 54 | 13.76% | 13.07% | 14.61% |
| Age 55 to 59 | 9.60% | 9.47% | 11.84% |
| Age 60 to 64 | 9.60% | 9.47% | 11.84% |
| Age 65 to 74 | 5.79% | 5.35% | 7.05% |
| Age 75 to 84 | 3.68% | 3.30% | 4.24% |
| Age 85 and over | 1.71% | 1.23% | 1.78% |
| RACE | | | |
| White | 42.97% | 49.35% | 72.41% |
| Black | 1.95% | 4.35% | 12.61% |
| Asian | 40.92% | 12.03% | 4.75% |
| American Indian | 0.47% | 1.15% | 0.95% |
| Other | 13.69% | 33.12% | 9.28% |
| Hispanic | 5.57% | 30.43% | 16.35% |
| Non-Hispanic | 94.43% | 69.57% | 83.65% |
| FAMILY | | | |
| Married, w/children | 40.96% | 34.80% | 30.42% |
| Married, no children | 39.43% | 32.46% | 42.46% |
| Single, w/children | 7.96% | 13.69% | 14.39% |
| Single, no children | 11.64% | 19.05% | 12.73% |
| Divorced | 9.34% | 7.49% | 10.62% |
| Separated | 5.67% | 7.52% | 4.97% |
| Widowed | 5.44% | 5.75% | 6.14% |
| Now Married | 48.02% | 42.32% | 46.32% |
| Never Married | 31.54% | 36.91% | 31.95% |
