| PEOPLE | Elk Grove | Arroyo Grande | United States |
| Population | 153,015 | 17,252 | 308,035,306 |
| Pop. Density | 3,627 | 2,957 | 87 |
| Pop. Change | 91.17% | 10.23% | 8.07% |
| Median Age | 34.3 | 45.4 | 37.3 |
| Households | 47,927 | 7,087 | 116,716,292 |
| Household Size | 3.18 | 2.4 | 2.58 |
| Male Population | 48.42% | 48.08% | 49.27% |
| Female Population | 51.58% | 51.92% | 50.96% |
| Married Population | 53.93% | 54.96% | 47.02% |
| Single Population | 46.07% | 45.04% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 7.23% | 4.91% | 6.56% |
| Age 5 to 9 | 8.25% | 5.45% | 6.61% |
| Age 10 to 14 | 9.04% | 6.64% | 6.71% |
| Age 15 to 17 | 5.62% | 4.06% | 4.21% |
| Age 18 to 20 | 2.94% | 2.12% | 2.95% |
| Age 21 to 24 | 5.64% | 4.79% | 7.01% |
| Age 25 to 34 | 12.19% | 10.17% | 13.33% |
| Age 35 to 44 | 15.71% | 11.30% | 13.33% |
| Age 45 to 49 | 15.24% | 15.40% | 14.61% |
| Age 50 to 54 | 15.24% | 15.40% | 14.61% |
| Age 55 to 59 | 9.81% | 14.91% | 11.84% |
| Age 60 to 64 | 9.81% | 14.91% | 11.84% |
| Age 65 to 74 | 4.82% | 9.28% | 7.05% |
| Age 75 to 84 | 2.56% | 7.38% | 4.24% |
| Age 85 and over | 0.94% | 3.58% | 1.78% |
| RACE | | | |
| White | 46.06% | 85.27% | 72.41% |
| Black | 11.22% | 0.90% | 12.61% |
| Asian | 26.31% | 3.45% | 4.75% |
| American Indian | 0.63% | 0.72% | 0.95% |
| Other | 15.78% | 9.66% | 9.28% |
| Hispanic | 11.51% | 73.67% | 16.35% |
| Non-Hispanic | 88.49% | 26.33% | 83.65% |
| FAMILY | | | |
| Married, w/children | 42.56% | 29.02% | 30.42% |
| Married, no children | 33.47% | 51.10% | 42.46% |
| Single, w/children | 13.68% | 10.22% | 14.39% |
| Single, no children | 10.29% | 9.66% | 12.73% |
| Divorced | 8.65% | 11.38% | 10.62% |
| Separated | 3.86% | 2.12% | 4.97% |
| Widowed | 3.71% | 7.44% | 6.14% |
| Now Married | 53.50% | 54.21% | 46.32% |
| Never Married | 30.29% | 24.85% | 31.95% |
