| | Crestline, CA | Blythe, CA | United States |
| Population | 9,350 | 18,125 | 329,725,481 |
| Female Population | 51.8% | 31.7% | 50.5% |
| Male Population | 48.2% | 68.3% | 49.5% |
| Median Age | 45.3 | 35.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 8,936 | 20,588 | 309,327,143 |
| Population - 2000 | 10,218 | 12,155 | 285,036,114 |
| Population - 1990 | 8,594 | 8,428 | 251,960,433 |
| Pop. 2000 to Now | -2.9% | 61.9% | 15.6% |
| Pop. 1990 to Now | 15.4% | 133.4% | 30.8% |
| space4 | | | |
| Population Density | 676.1 | 681.2 | 93.4 |
| Land Area | 13.8 | 26.6 | 3,531,905.4 |
| Water Area | 0.2 | 0.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Crestline, CA | Blythe, CA | United States |
| Age 0 to 4 | 5.5% | 5.6% | 5.9% |
| Age 5 to 9 | 4.9% | 5.1% | 6.1% |
| Age 10 to 14 | 5.9% | 5.1% | 6.6% |
| Age 15 to 17 | 2.3% | 3.4% | 3.9% |
| Age 18 to 20 | 3.0% | 2.6% | 4.0% |
| Age 21 to 24 | 4.6% | 7.0% | 5.2% |
| Age 25 to 34 | 13.3% | 20.1% | 13.8% |
| Age 35 to 44 | 9.8% | 17.9% | 12.9% |
| Age 45 to 54 | 12.8% | 12.7% | 12.6% |
| Age 55 to 59 | 9.7% | 5.5% | 6.7% |
| Age 60 to 64 | 8.8% | 5.4% | 6.3% |
| Age 65 to 74 | 14.3% | 5.6% | 9.6% |
| Age 75 to 84 | 4.0% | 3.0% | 4.5% |
| Age 85 and over | 1.0% | 1.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Crestline, CA | Blythe, CA | United States |
| White | 68.2% | 24.2% | 59.4% |
| Black | 3.8% | 11.9% | 12.2% |
| Asian | 0.7% | 2.2% | 5.6% |
| Native American | 1.1% | 0.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.4% | 0.2% |
| Other | 1.0% | 0.3% | 0.4% |
| Two or More Races | 3.7% | 2.9% | 3.2% |
| Hispanic | 21.4% | 57.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Crestline, CA | Blythe, CA | United States |
| Married Population | 49.4% | 34.8% | 49.8% |
| Currently Married | 48.8% | 32.3% | 48.0% |
| Married but Separated | 0.6% | 2.5% | 1.8% |
| Single Population | 50.6% | 65.2% | 50.2% |
| Never Married | 27.0% | 49.3% | 33.8% |
| Divorced | 16.5% | 11.9% | 10.8% |
| Widowed | 7.1% | 4.0% | 5.6% |
| space5 | | | |
| Household Size | 2.45 | 2.83 | 2.60 |
| Households | 3,795 | 3,945 | 124,010,992 |
| Family Households | 2,466 | 2,845 | 80,755,759 |
| Married couple, w/children | 23.3% | 22.2% | 30.5% |
| Married couple, no children | 48.1% | 41.5% | 42.9% |
| Non Family Households | 1,329 | 1,100 | 43,255,233 |
| Single householder, w/children | 13.4% | 31.1% | 15.8% |
| Single householder, no children | 15.1% | 5.2% | 10.8% |