| PEOPLE | Boulder | Gilroy | United States |
| Population | 97,385 | 48,821 | 308,035,306 |
| Pop. Density | 3,948 | 3,024 | 87 |
| Pop. Change | 2.41% | 14.66% | 8.07% |
| Median Age | 28.8 | 32.4 | 37.3 |
| Households | 41,302 | 14,175 | 116,716,292 |
| Household Size | 2.16 | 3.39 | 2.58 |
| Male Population | 51.35% | 49.63% | 49.27% |
| Female Population | 48.65% | 50.37% | 50.96% |
| Married Population | 29.68% | 49.58% | 47.02% |
| Single Population | 70.32% | 50.42% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 4.06% | 8.49% | 6.56% |
| Age 5 to 9 | 3.97% | 8.64% | 6.61% |
| Age 10 to 14 | 3.65% | 8.61% | 6.71% |
| Age 15 to 17 | 2.21% | 4.96% | 4.21% |
| Age 18 to 20 | 8.76% | 2.88% | 2.95% |
| Age 21 to 24 | 20.35% | 6.36% | 7.01% |
| Age 25 to 34 | 15.99% | 13.76% | 13.33% |
| Age 35 to 44 | 11.73% | 15.13% | 13.33% |
| Age 45 to 49 | 10.79% | 13.55% | 14.61% |
| Age 50 to 54 | 10.79% | 13.55% | 14.61% |
| Age 55 to 59 | 9.57% | 9.24% | 11.84% |
| Age 60 to 64 | 9.57% | 9.24% | 11.84% |
| Age 65 to 74 | 4.60% | 4.76% | 7.05% |
| Age 75 to 84 | 2.73% | 2.53% | 4.24% |
| Age 85 and over | 1.61% | 1.10% | 1.78% |
| RACE | | | |
| White | 88.00% | 58.73% | 72.41% |
| Black | 0.90% | 1.93% | 12.61% |
| Asian | 4.73% | 7.06% | 4.75% |
| American Indian | 0.44% | 1.70% | 0.95% |
| Other | 5.93% | 30.57% | 9.28% |
| Hispanic | 12.31% | 15.35% | 16.35% |
| Non-Hispanic | 87.69% | 84.65% | 83.65% |
| FAMILY | | | |
| Married, w/children | 34.21% | 39.47% | 30.42% |
| Married, no children | 45.48% | 32.52% | 42.46% |
| Single, w/children | 11.18% | 15.61% | 14.39% |
| Single, no children | 9.13% | 12.41% | 12.73% |
| Divorced | 10.00% | 8.34% | 10.62% |
| Separated | 4.73% | 7.77% | 4.97% |
| Widowed | 3.36% | 5.19% | 6.14% |
| Now Married | 29.69% | 49.41% | 46.32% |
| Never Married | 52.23% | 29.30% | 31.95% |
