| | Grizzly Flats, CA | Dorrington, CA | United States |
| Population | 1,205 | 463 | 329,725,481 |
| Female Population | 51.7% | 48.4% | 50.5% |
| Male Population | 48.3% | 51.6% | 49.5% |
| Median Age | 45 | 65.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 793 | 574 | 309,327,143 |
| Population - 2000 | 673 | 727 | 285,036,114 |
| Population - 1990 | 475 | 538 | 251,960,433 |
| Pop. 2000 to Now | 48.1% | -66.3% | 15.6% |
| Pop. 1990 to Now | 109.9% | -54.5% | 30.8% |
| space4 | | | |
| Population Density | 181.8 | 127.6 | 93.4 |
| Land Area | 6.6 | 3.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Grizzly Flats, CA | Dorrington, CA | United States |
| Age 0 to 4 | 0.0% | 3.7% | 5.9% |
| Age 5 to 9 | 10.3% | 3.9% | 6.1% |
| Age 10 to 14 | 15.0% | 0.0% | 6.6% |
| Age 15 to 17 | 5.8% | 1.7% | 3.9% |
| Age 18 to 20 | 0.0% | 1.1% | 4.0% |
| Age 21 to 24 | 1.0% | 0.0% | 5.2% |
| Age 25 to 34 | 3.2% | 0.0% | 13.8% |
| Age 35 to 44 | 15.0% | 6.0% | 12.9% |
| Age 45 to 54 | 8.1% | 4.5% | 12.6% |
| Age 55 to 59 | 10.0% | 10.2% | 6.7% |
| Age 60 to 64 | 3.7% | 15.6% | 6.3% |
| Age 65 to 74 | 23.3% | 21.4% | 9.6% |
| Age 75 to 84 | 3.2% | 15.8% | 4.5% |
| Age 85 and over | 1.3% | 16.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Grizzly Flats, CA | Dorrington, CA | United States |
| White | 89.1% | 96.3% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.2% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 1.1% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 10.5% | 2.4% | 3.2% |
| Hispanic | 0.3% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Grizzly Flats, CA | Dorrington, CA | United States |
| Married Population | 77.1% | 75.5% | 49.8% |
| Currently Married | 77.1% | 73.8% | 48.0% |
| Married but Separated | 0.0% | 1.6% | 1.8% |
| Single Population | 22.9% | 24.5% | 50.2% |
| Never Married | 11.1% | 4.7% | 33.8% |
| Divorced | 8.8% | 9.6% | 10.8% |
| Widowed | 3.0% | 10.3% | 5.6% |
| space5 | | | |
| Household Size | 2.42 | 1.93 | 2.60 |
| Households | 497 | 238 | 124,010,992 |
| Family Households | 349 | 159 | 80,755,759 |
| Married couple, w/children | 58.7% | 8.8% | 30.5% |
| Married couple, no children | 41.3% | 86.8% | 42.9% |
| Non Family Households | 148 | 79 | 43,255,233 |
| Single householder, w/children | 0.0% | 4.4% | 15.8% |
| Single householder, no children | 0.0% | 0.0% | 10.8% |