| PEOPLE | Hayward | Atwater | United States |
| Population | 144,186 | 28,168 | 308,035,306 |
| Pop. Density | 3,181 | 4,627 | 87 |
| Pop. Change | 2.27% | 19.65% | 8.07% |
| Median Age | 33.6 | 30 | 37.3 |
| Households | 45,365 | 8,838 | 116,716,292 |
| Household Size | 3.13 | 3.15 | 2.58 |
| Male Population | 49.34% | 48.91% | 49.27% |
| Female Population | 50.66% | 51.09% | 50.96% |
| Married Population | 41.79% | 43.46% | 47.02% |
| Single Population | 58.21% | 56.54% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 7.47% | 8.86% | 6.56% |
| Age 5 to 9 | 6.77% | 8.78% | 6.61% |
| Age 10 to 14 | 6.39% | 8.65% | 6.71% |
| Age 15 to 17 | 3.90% | 5.72% | 4.21% |
| Age 18 to 20 | 3.14% | 3.51% | 2.95% |
| Age 21 to 24 | 8.01% | 7.02% | 7.01% |
| Age 25 to 34 | 16.55% | 14.21% | 13.33% |
| Age 35 to 44 | 13.97% | 12.38% | 13.33% |
| Age 45 to 49 | 13.39% | 11.77% | 14.61% |
| Age 50 to 54 | 13.39% | 11.77% | 14.61% |
| Age 55 to 59 | 10.26% | 8.68% | 11.84% |
| Age 60 to 64 | 10.26% | 8.68% | 11.84% |
| Age 65 to 74 | 5.35% | 5.87% | 7.05% |
| Age 75 to 84 | 3.33% | 3.49% | 4.24% |
| Age 85 and over | 1.48% | 1.05% | 1.78% |
| RACE | | | |
| White | 34.20% | 65.36% | 72.41% |
| Black | 11.86% | 4.35% | 12.61% |
| Asian | 21.96% | 5.03% | 4.75% |
| American Indian | 0.97% | 1.29% | 0.95% |
| Other | 31.01% | 23.97% | 9.28% |
| Hispanic | 16.85% | 5.74% | 16.35% |
| Non-Hispanic | 83.15% | 94.26% | 83.65% |
| FAMILY | | | |
| Married, w/children | 32.51% | 35.44% | 30.42% |
| Married, no children | 34.20% | 31.88% | 42.46% |
| Single, w/children | 15.42% | 19.55% | 14.39% |
| Single, no children | 17.87% | 13.13% | 12.73% |
| Divorced | 9.90% | 12.96% | 10.62% |
| Separated | 7.37% | 5.44% | 4.97% |
| Widowed | 5.73% | 4.74% | 6.14% |
| Now Married | 41.60% | 42.78% | 46.32% |
| Never Married | 35.39% | 34.08% | 31.95% |
