| | Thermal, CA | Mecca, CA | United States |
| Population | 1,198 | 4,451 | 329,725,481 |
| Female Population | 79.1% | 49.5% | 50.5% |
| Male Population | 20.9% | 50.5% | 49.5% |
| Median Age | 46.3 | 49.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,490 | 7,872 | 309,327,143 |
| Population - 2000 | 2,581 | 5,402 | 285,036,114 |
| Population - 1990 | 1,866 | 1,966 | 251,960,433 |
| Pop. 2000 to Now | -10.9% | 55.1% | 15.6% |
| Pop. 1990 to Now | 23.3% | 326.3% | 30.8% |
| space4 | | | |
| Population Density | 127.7 | 639.6 | 93.4 |
| Land Area | 9.4 | 7.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Thermal, CA | Mecca, CA | United States |
| Age 0 to 4 | 2.8% | 1.7% | 5.9% |
| Age 5 to 9 | 5.3% | 4.2% | 6.1% |
| Age 10 to 14 | 4.2% | 2.2% | 6.6% |
| Age 15 to 17 | 5.5% | 1.8% | 3.9% |
| Age 18 to 20 | 2.3% | 1.1% | 4.0% |
| Age 21 to 24 | 7.7% | 3.3% | 5.2% |
| Age 25 to 34 | 12.3% | 19.2% | 13.8% |
| Age 35 to 44 | 7.8% | 10.2% | 12.9% |
| Age 45 to 54 | 25.9% | 17.7% | 12.6% |
| Age 55 to 59 | 3.3% | 11.7% | 6.7% |
| Age 60 to 64 | 1.0% | 12.4% | 6.3% |
| Age 65 to 74 | 0.8% | 13.8% | 9.6% |
| Age 75 to 84 | 6.1% | 0.0% | 4.5% |
| Age 85 and over | 15.0% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Thermal, CA | Mecca, CA | United States |
| White | 1.1% | 0.0% | 59.4% |
| Black | 0.1% | 0.0% | 12.2% |
| Asian | 0.1% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 1.6% | 3.2% |
| Hispanic | 98.7% | 98.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Thermal, CA | Mecca, CA | United States |
| Married Population | 27.9% | 66.3% | 49.8% |
| Currently Married | 25.3% | 63.8% | 48.0% |
| Married but Separated | 2.6% | 2.5% | 1.8% |
| Single Population | 72.1% | 33.7% | 50.2% |
| Never Married | 53.0% | 29.2% | 33.8% |
| Divorced | 1.0% | 2.2% | 10.8% |
| Widowed | 18.0% | 2.3% | 5.6% |
| space5 | | | |
| Household Size | 1.78 | 2.10 | 2.60 |
| Households | 670 | 2,123 | 124,010,992 |
| Family Households | 177 | 1,155 | 80,755,759 |
| Married couple, w/children | 26.6% | 9.3% | 30.5% |
| Married couple, no children | 8.5% | 65.7% | 42.9% |
| Non Family Households | 493 | 968 | 43,255,233 |
| Single householder, w/children | 32.8% | 6.1% | 15.8% |
| Single householder, no children | 32.2% | 18.9% | 10.8% |