| | Soledad, CA | Pittsburg, CA | United States |
| Population | 25,102 | 75,701 | 329,725,481 |
| Female Population | 31.5% | 50.3% | 50.5% |
| Male Population | 68.5% | 49.7% | 49.5% |
| Median Age | 35.3 | 35.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 26,026 | 63,475 | 309,327,143 |
| Population - 2000 | 11,263 | 56,769 | 285,036,114 |
| Population - 1990 | 7,146 | 47,564 | 251,960,433 |
| Pop. 2000 to Now | 124.2% | 27.9% | 15.6% |
| Pop. 1990 to Now | 253.3% | 52.7% | 30.8% |
| space4 | | | |
| Population Density | 5,707.6 | 4,365.7 | 93.4 |
| Land Area | 4.4 | 17.3 | 3,531,905.4 |
| Water Area | 0.2 | 2.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Soledad, CA | Pittsburg, CA | United States |
| Age 0 to 4 | 5.4% | 6.9% | 5.9% |
| Age 5 to 9 | 5.6% | 5.5% | 6.1% |
| Age 10 to 14 | 9.1% | 6.2% | 6.6% |
| Age 15 to 17 | 3.4% | 4.1% | 3.9% |
| Age 18 to 20 | 4.4% | 4.1% | 4.0% |
| Age 21 to 24 | 6.2% | 6.4% | 5.2% |
| Age 25 to 34 | 15.3% | 16.7% | 13.8% |
| Age 35 to 44 | 16.7% | 13.4% | 12.9% |
| Age 45 to 54 | 16.8% | 12.1% | 12.6% |
| Age 55 to 59 | 7.8% | 5.7% | 6.7% |
| Age 60 to 64 | 3.7% | 6.4% | 6.3% |
| Age 65 to 74 | 3.7% | 8.0% | 9.6% |
| Age 75 to 84 | 1.7% | 3.3% | 4.5% |
| Age 85 and over | 0.3% | 1.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Soledad, CA | Pittsburg, CA | United States |
| White | 10.3% | 19.2% | 59.4% |
| Black | 9.3% | 13.3% | 12.2% |
| Asian | 2.1% | 17.9% | 5.6% |
| Native American | 0.4% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.3% | 0.7% | 0.2% |
| Other | 0.2% | 0.7% | 0.4% |
| Two or More Races | 1.1% | 4.2% | 3.2% |
| Hispanic | 76.4% | 43.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Soledad, CA | Pittsburg, CA | United States |
| Married Population | 41.7% | 47.3% | 49.8% |
| Currently Married | 38.6% | 45.1% | 48.0% |
| Married but Separated | 3.1% | 2.2% | 1.8% |
| Single Population | 58.3% | 52.7% | 50.2% |
| Never Married | 45.8% | 39.7% | 33.8% |
| Divorced | 10.2% | 9.0% | 10.8% |
| Widowed | 2.3% | 4.0% | 5.6% |
| space5 | | | |
| Household Size | 4.53 | 3.33 | 2.60 |
| Households | 3,660 | 22,604 | 124,010,992 |
| Family Households | 3,287 | 17,678 | 80,755,759 |
| Married couple, w/children | 52.8% | 31.5% | 30.5% |
| Married couple, no children | 22.5% | 35.3% | 42.9% |
| Non Family Households | 373 | 4,926 | 43,255,233 |
| Single householder, w/children | 15.8% | 18.2% | 15.8% |
| Single householder, no children | 8.9% | 15.0% | 10.8% |