| PEOPLE | Ilwaco | Manteca | United States |
| Population | 936 | 67,096 | 308,035,306 |
| Pop. Density | 446 | 3,784 | 87 |
| Pop. Change | -0.88% | 32.86% | 8.07% |
| Median Age | 50.2 | 33.5 | 37.3 |
| Households | 443 | 21,618 | 116,716,292 |
| Household Size | 2.02 | 3.07 | 2.58 |
| Male Population | 51.50% | 49.18% | 49.27% |
| Female Population | 48.50% | 50.82% | 50.96% |
| Married Population | 48.37% | 46.77% | 47.02% |
| Single Population | 51.63% | 53.23% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 5.02% | 7.72% | 6.56% |
| Age 5 to 9 | 4.38% | 7.58% | 6.61% |
| Age 10 to 14 | 3.85% | 8.44% | 6.71% |
| Age 15 to 17 | 3.42% | 5.22% | 4.21% |
| Age 18 to 20 | 1.18% | 3.11% | 2.95% |
| Age 21 to 24 | 4.06% | 6.68% | 7.01% |
| Age 25 to 34 | 11.22% | 13.10% | 13.33% |
| Age 35 to 44 | 9.94% | 13.84% | 13.33% |
| Age 45 to 49 | 13.57% | 14.60% | 14.61% |
| Age 50 to 54 | 13.57% | 14.60% | 14.61% |
| Age 55 to 59 | 21.79% | 9.79% | 11.84% |
| Age 60 to 64 | 21.79% | 9.79% | 11.84% |
| Age 65 to 74 | 12.07% | 5.58% | 7.05% |
| Age 75 to 84 | 6.41% | 3.11% | 4.24% |
| Age 85 and over | 3.10% | 1.22% | 1.78% |
| RACE | | | |
| White | 89.85% | 62.36% | 72.41% |
| Black | 0.32% | 4.28% | 12.61% |
| Asian | 0.53% | 7.12% | 4.75% |
| American Indian | 2.14% | 1.10% | 0.95% |
| Other | 7.16% | 25.15% | 9.28% |
| Hispanic | 3.08% | 3.91% | 16.35% |
| Non-Hispanic | 96.92% | 96.09% | 83.65% |
| FAMILY | | | |
| Married, w/children | 21.01% | 35.89% | 30.42% |
| Married, no children | 59.53% | 36.36% | 42.46% |
| Single, w/children | 9.34% | 15.21% | 14.39% |
| Single, no children | 10.12% | 12.55% | 12.73% |
| Divorced | 14.61% | 11.49% | 10.62% |
| Separated | 4.31% | 5.39% | 4.97% |
| Widowed | 9.70% | 5.05% | 6.14% |
| Now Married | 48.26% | 46.89% | 46.32% |
| Never Married | 23.11% | 31.18% | 31.95% |
