| | Alleghany, CA | Soldotna, AK | United States |
| Population | 93 | 4,370 | 329,725,481 |
| Female Population | 59.1% | 56.0% | 50.5% |
| Male Population | 40.9% | 44.0% | 49.5% |
| Median Age | 59.7 | 39.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 53 | 4,188 | 309,327,143 |
| Population - 2000 | 59 | 3,759 | 285,036,114 |
| Population - 1990 | 57 | 3,482 | 251,960,433 |
| Pop. 2000 to Now | 115.3% | 27.4% | 15.6% |
| Pop. 1990 to Now | 122.8% | 37.6% | 30.8% |
| space4 | | | |
| Population Density | 266.5 | 628.3 | 93.4 |
| Land Area | 0.3 | 7.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Alleghany, CA | Soldotna, AK | United States |
| Age 0 to 4 | 0.0% | 4.4% | 5.9% |
| Age 5 to 9 | 0.0% | 7.7% | 6.1% |
| Age 10 to 14 | 0.0% | 3.2% | 6.6% |
| Age 15 to 17 | 0.0% | 6.3% | 3.9% |
| Age 18 to 20 | 0.0% | 5.8% | 4.0% |
| Age 21 to 24 | 0.0% | 5.7% | 5.2% |
| Age 25 to 34 | 0.0% | 11.8% | 13.8% |
| Age 35 to 44 | 0.0% | 10.9% | 12.9% |
| Age 45 to 54 | 0.0% | 11.2% | 12.6% |
| Age 55 to 59 | 59.1% | 7.5% | 6.7% |
| Age 60 to 64 | 0.0% | 7.6% | 6.3% |
| Age 65 to 74 | 40.9% | 12.7% | 9.6% |
| Age 75 to 84 | 0.0% | 3.1% | 4.5% |
| Age 85 and over | 0.0% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Alleghany, CA | Soldotna, AK | United States |
| White | 100.0% | 82.1% | 59.4% |
| Black | 0.0% | 1.2% | 12.2% |
| Asian | 0.0% | 1.1% | 5.6% |
| Native American | 0.0% | 6.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 6.0% | 3.2% |
| Hispanic | 0.0% | 3.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Alleghany, CA | Soldotna, AK | United States |
| Married Population | 71.0% | 47.0% | 49.8% |
| Currently Married | 71.0% | 41.0% | 48.0% |
| Married but Separated | 0.0% | 6.1% | 1.8% |
| Single Population | 29.0% | 53.0% | 50.2% |
| Never Married | 29.0% | 32.9% | 33.8% |
| Divorced | 0.0% | 15.3% | 10.8% |
| Widowed | 0.0% | 4.8% | 5.6% |
| space5 | | | |
| Household Size | 1.69 | 2.51 | 2.60 |
| Households | 55 | 1,722 | 124,010,992 |
| Family Households | 28 | 1,076 | 80,755,759 |
| Married couple, w/children | 0.0% | 24.5% | 30.5% |
| Married couple, no children | 100.0% | 39.2% | 42.9% |
| Non Family Households | 27 | 646 | 43,255,233 |
| Single householder, w/children | 0.0% | 20.0% | 15.8% |
| Single householder, no children | 0.0% | 16.3% | 10.8% |