| PEOPLE | Forest Grove | Idaho City | United States |
| Population | 21,083 | 485 | 308,035,306 |
| Pop. Density | 3,675 | 724 | 87 |
| Pop. Change | 15.27% | 11.29% | 8.07% |
| Median Age | 32.8 | 42.2 | 37.3 |
| Households | 7,385 | 216 | 116,716,292 |
| Household Size | 2.75 | 2.28 | 2.58 |
| Male Population | 47.97% | 51.13% | 49.27% |
| Female Population | 52.03% | 48.87% | 50.96% |
| Married Population | 45.73% | 55.86% | 47.02% |
| Single Population | 54.27% | 44.14% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 7.02% | 4.95% | 6.56% |
| Age 5 to 9 | 7.60% | 7.63% | 6.61% |
| Age 10 to 14 | 7.37% | 7.84% | 6.71% |
| Age 15 to 17 | 4.62% | 3.51% | 4.21% |
| Age 18 to 20 | 4.39% | 2.68% | 2.95% |
| Age 21 to 24 | 8.88% | 3.92% | 7.01% |
| Age 25 to 34 | 12.97% | 11.75% | 13.33% |
| Age 35 to 44 | 12.64% | 10.72% | 13.33% |
| Age 45 to 49 | 12.56% | 16.29% | 14.61% |
| Age 50 to 54 | 12.56% | 16.29% | 14.61% |
| Age 55 to 59 | 9.63% | 17.73% | 11.84% |
| Age 60 to 64 | 9.63% | 17.73% | 11.84% |
| Age 65 to 74 | 5.36% | 9.07% | 7.05% |
| Age 75 to 84 | 3.97% | 3.09% | 4.24% |
| Age 85 and over | 3.01% | 0.82% | 1.78% |
| RACE | | | |
| White | 78.81% | 94.23% | 72.41% |
| Black | 0.78% | 0.00% | 12.61% |
| Asian | 2.64% | 0.82% | 4.75% |
| American Indian | 1.10% | 1.65% | 0.95% |
| Other | 16.68% | 3.30% | 9.28% |
| Hispanic | 69.90% | 11.15% | 16.35% |
| Non-Hispanic | 30.10% | 88.85% | 83.65% |
| FAMILY | | | |
| Married, w/children | 37.12% | 26.61% | 30.42% |
| Married, no children | 38.78% | 49.19% | 42.46% |
| Single, w/children | 14.74% | 16.94% | 14.39% |
| Single, no children | 9.36% | 7.26% | 12.73% |
| Divorced | 12.52% | 20.85% | 10.62% |
| Separated | 6.91% | 2.01% | 4.97% |
| Widowed | 6.34% | 2.76% | 6.14% |
| Now Married | 46.01% | 55.78% | 46.32% |
| Never Married | 28.21% | 18.59% | 31.95% |
