| | Fossil, OR | Bonanza, OR | United States |
| Population | 533 | 477 | 329,725,481 |
| Female Population | 51.4% | 48.6% | 50.5% |
| Male Population | 48.6% | 51.4% | 49.5% |
| Median Age | 46 | 56.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 473 | 409 | 309,327,143 |
| Population - 2000 | 469 | 415 | 285,036,114 |
| Population - 1990 | 399 | 323 | 251,960,433 |
| Pop. 2000 to Now | -3.0% | 4.1% | 15.6% |
| Pop. 1990 to Now | 14.0% | 33.8% | 30.8% |
| space4 | | | |
| Population Density | 679.9 | 581.7 | 93.4 |
| Land Area | 0.8 | 0.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Fossil, OR | Bonanza, OR | United States |
| Age 0 to 4 | 6.8% | 2.5% | 5.9% |
| Age 5 to 9 | 3.2% | 2.9% | 6.1% |
| Age 10 to 14 | 2.8% | 7.1% | 6.6% |
| Age 15 to 17 | 2.6% | 3.8% | 3.9% |
| Age 18 to 20 | 1.3% | 6.3% | 4.0% |
| Age 21 to 24 | 2.3% | 0.0% | 5.2% |
| Age 25 to 34 | 25.1% | 1.3% | 13.8% |
| Age 35 to 44 | 4.7% | 15.1% | 12.9% |
| Age 45 to 54 | 10.9% | 9.6% | 12.6% |
| Age 55 to 59 | 2.3% | 9.4% | 6.7% |
| Age 60 to 64 | 8.4% | 5.0% | 6.3% |
| Age 65 to 74 | 19.5% | 24.9% | 9.6% |
| Age 75 to 84 | 6.9% | 11.3% | 4.5% |
| Age 85 and over | 3.2% | 0.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Fossil, OR | Bonanza, OR | United States |
| White | 78.4% | 84.3% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 1.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.1% | 0.0% | 0.4% |
| Two or More Races | 8.4% | 0.8% | 3.2% |
| Hispanic | 12.0% | 13.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Fossil, OR | Bonanza, OR | United States |
| Married Population | 55.3% | 67.1% | 49.8% |
| Currently Married | 53.5% | 64.7% | 48.0% |
| Married but Separated | 1.7% | 2.4% | 1.8% |
| Single Population | 44.7% | 32.9% | 50.2% |
| Never Married | 11.0% | 22.8% | 33.8% |
| Divorced | 26.2% | 4.3% | 10.8% |
| Widowed | 7.5% | 5.8% | 5.6% |
| space5 | | | |
| Household Size | 2.19 | 2.33 | 2.60 |
| Households | 243 | 205 | 124,010,992 |
| Family Households | 137 | 159 | 80,755,759 |
| Married couple, w/children | 40.9% | 7.5% | 30.5% |
| Married couple, no children | 35.8% | 73.6% | 42.9% |
| Non Family Households | 106 | 46 | 43,255,233 |
| Single householder, w/children | 15.3% | 15.7% | 15.8% |
| Single householder, no children | 8.0% | 3.1% | 10.8% |