| | Angwin, CA | Rockford, WA | United States |
| Population | 3,088 | 416 | 329,725,481 |
| Female Population | 44.3% | 48.3% | 50.5% |
| Male Population | 55.7% | 51.7% | 49.5% |
| Median Age | 24.8 | 51.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,737 | 473 | 309,327,143 |
| Population - 2000 | 3,148 | 413 | 285,036,114 |
| Population - 1990 | 3,503 | 481 | 251,960,433 |
| Pop. 2000 to Now | 6.3% | 19.4% | 15.6% |
| Pop. 1990 to Now | -4.5% | 2.5% | 30.8% |
| space4 | | | |
| Population Density | 639.5 | 612.7 | 93.4 |
| Land Area | 4.8 | 0.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Angwin, CA | Rockford, WA | United States |
| Age 0 to 4 | 4.1% | 1.0% | 5.9% |
| Age 5 to 9 | 3.6% | 7.5% | 6.1% |
| Age 10 to 14 | 3.9% | 9.9% | 6.6% |
| Age 15 to 17 | 3.1% | 3.6% | 3.9% |
| Age 18 to 20 | 23.5% | 1.4% | 4.0% |
| Age 21 to 24 | 12.4% | 1.2% | 5.2% |
| Age 25 to 34 | 9.6% | 11.3% | 13.8% |
| Age 35 to 44 | 10.3% | 11.8% | 12.9% |
| Age 45 to 54 | 10.7% | 11.8% | 12.6% |
| Age 55 to 59 | 2.9% | 9.1% | 6.7% |
| Age 60 to 64 | 8.2% | 11.3% | 6.3% |
| Age 65 to 74 | 4.4% | 10.1% | 9.6% |
| Age 75 to 84 | 2.5% | 7.5% | 4.5% |
| Age 85 and over | 0.9% | 2.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Angwin, CA | Rockford, WA | United States |
| White | 49.8% | 83.7% | 59.4% |
| Black | 7.9% | 0.0% | 12.2% |
| Asian | 14.1% | 0.0% | 5.6% |
| Native American | 0.0% | 3.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.3% | 0.0% | 0.2% |
| Other | 0.6% | 0.5% | 0.4% |
| Two or More Races | 8.5% | 7.5% | 3.2% |
| Hispanic | 18.8% | 5.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Angwin, CA | Rockford, WA | United States |
| Married Population | 31.8% | 55.9% | 49.8% |
| Currently Married | 31.4% | 51.8% | 48.0% |
| Married but Separated | 0.4% | 4.1% | 1.8% |
| Single Population | 68.2% | 44.1% | 50.2% |
| Never Married | 59.1% | 18.8% | 33.8% |
| Divorced | 7.6% | 20.9% | 10.8% |
| Widowed | 1.4% | 4.4% | 5.6% |
| space5 | | | |
| Household Size | 2.53 | 2.30 | 2.60 |
| Households | 787 | 181 | 124,010,992 |
| Family Households | 447 | 117 | 80,755,759 |
| Married couple, w/children | 51.9% | 23.9% | 30.5% |
| Married couple, no children | 38.0% | 48.7% | 42.9% |
| Non Family Households | 340 | 64 | 43,255,233 |
| Single householder, w/children | 7.4% | 15.4% | 15.8% |
| Single householder, no children | 2.7% | 12.0% | 10.8% |