| | Shafter, CA | Wasco, CA | United States |
| Population | 19,897 | 27,505 | 329,725,481 |
| Female Population | 50.7% | 39.7% | 50.5% |
| Male Population | 49.4% | 60.3% | 49.5% |
| Median Age | 27.5 | 30.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 17,174 | 25,725 | 309,327,143 |
| Population - 2000 | 12,736 | 21,263 | 285,036,114 |
| Population - 1990 | 8,409 | 12,412 | 251,960,433 |
| Pop. 2000 to Now | 62.8% | 35.1% | 15.6% |
| Pop. 1990 to Now | 146.6% | 131.5% | 30.8% |
| space4 | | | |
| Population Density | 513.8 | 2,929.8 | 93.4 |
| Land Area | 38.7 | 9.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Shafter, CA | Wasco, CA | United States |
| Age 0 to 4 | 6.2% | 7.5% | 5.9% |
| Age 5 to 9 | 9.7% | 8.2% | 6.1% |
| Age 10 to 14 | 12.5% | 6.5% | 6.6% |
| Age 15 to 17 | 6.2% | 2.8% | 3.9% |
| Age 18 to 20 | 5.0% | 3.7% | 4.0% |
| Age 21 to 24 | 5.9% | 7.4% | 5.2% |
| Age 25 to 34 | 16.0% | 23.9% | 13.8% |
| Age 35 to 44 | 14.1% | 14.3% | 12.9% |
| Age 45 to 54 | 11.0% | 9.3% | 12.6% |
| Age 55 to 59 | 3.1% | 5.9% | 6.7% |
| Age 60 to 64 | 2.8% | 3.8% | 6.3% |
| Age 65 to 74 | 4.8% | 4.4% | 9.6% |
| Age 75 to 84 | 1.6% | 1.7% | 4.5% |
| Age 85 and over | 1.0% | 0.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Shafter, CA | Wasco, CA | United States |
| White | 12.9% | 6.3% | 59.4% |
| Black | 1.5% | 5.5% | 12.2% |
| Asian | 0.5% | 0.8% | 5.6% |
| Native American | 0.1% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.3% | 0.9% | 3.2% |
| Hispanic | 84.7% | 86.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Shafter, CA | Wasco, CA | United States |
| Married Population | 48.4% | 47.8% | 49.8% |
| Currently Married | 46.2% | 43.3% | 48.0% |
| Married but Separated | 2.1% | 4.5% | 1.8% |
| Single Population | 51.6% | 52.2% | 50.2% |
| Never Married | 42.8% | 41.8% | 33.8% |
| Divorced | 4.9% | 6.5% | 10.8% |
| Widowed | 4.0% | 3.8% | 5.6% |
| space5 | | | |
| Household Size | 3.84 | 3.52 | 2.60 |
| Households | 4,981 | 6,254 | 124,010,992 |
| Family Households | 4,156 | 5,221 | 80,755,759 |
| Married couple, w/children | 48.0% | 36.7% | 30.5% |
| Married couple, no children | 25.0% | 33.9% | 42.9% |
| Non Family Households | 825 | 1,033 | 43,255,233 |
| Single householder, w/children | 20.5% | 19.7% | 15.8% |
| Single householder, no children | 6.5% | 9.6% | 10.8% |