| | Guadalupe, CA | El Monte, CA | United States |
| Population | 8,138 | 110,144 | 329,725,481 |
| Female Population | 48.5% | 49.3% | 50.5% |
| Male Population | 51.5% | 50.7% | 49.5% |
| Median Age | 28.3 | 36.3 | 38.4 |
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| Population - 2010 | 7,082 | 113,562 | 309,327,143 |
| Population - 2000 | 5,659 | 115,965 | 285,036,114 |
| Population - 1990 | 5,479 | 106,209 | 251,960,433 |
| Pop. 2000 to Now | 43.8% | -3.1% | 15.6% |
| Pop. 1990 to Now | 48.6% | 5.8% | 30.8% |
| space4 | | | |
| Population Density | 6,212.2 | 11,518.9 | 93.4 |
| Land Area | 1.3 | 9.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Guadalupe, CA | El Monte, CA | United States |
| Age 0 to 4 | 11.0% | 6.3% | 5.9% |
| Age 5 to 9 | 8.8% | 5.6% | 6.1% |
| Age 10 to 14 | 10.4% | 7.1% | 6.6% |
| Age 15 to 17 | 5.9% | 4.2% | 3.9% |
| Age 18 to 20 | 2.9% | 4.1% | 4.0% |
| Age 21 to 24 | 6.8% | 6.4% | 5.2% |
| Age 25 to 34 | 13.1% | 14.3% | 13.8% |
| Age 35 to 44 | 14.2% | 13.6% | 12.9% |
| Age 45 to 54 | 8.7% | 14.0% | 12.6% |
| Age 55 to 59 | 5.8% | 5.9% | 6.7% |
| Age 60 to 64 | 3.4% | 5.4% | 6.3% |
| Age 65 to 74 | 5.7% | 7.5% | 9.6% |
| Age 75 to 84 | 1.7% | 3.9% | 4.5% |
| Age 85 and over | 1.4% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Guadalupe, CA | El Monte, CA | United States |
| White | 6.7% | 3.4% | 59.4% |
| Black | 0.2% | 0.4% | 12.2% |
| Asian | 4.2% | 29.7% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.7% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 0.6% | 0.5% | 3.2% |
| Hispanic | 88.2% | 65.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Guadalupe, CA | El Monte, CA | United States |
| Married Population | 47.0% | 45.1% | 49.8% |
| Currently Married | 44.5% | 42.2% | 48.0% |
| Married but Separated | 2.5% | 2.8% | 1.8% |
| Single Population | 53.0% | 54.9% | 50.2% |
| Never Married | 43.3% | 43.3% | 33.8% |
| Divorced | 3.4% | 6.6% | 10.8% |
| Widowed | 6.3% | 5.1% | 5.6% |
| space5 | | | |
| Household Size | 3.97 | 3.79 | 2.60 |
| Households | 2,051 | 28,731 | 124,010,992 |
| Family Households | 1,783 | 23,317 | 80,755,759 |
| Married couple, w/children | 39.2% | 26.8% | 30.5% |
| Married couple, no children | 22.2% | 31.0% | 42.9% |
| Non Family Households | 268 | 5,414 | 43,255,233 |
| Single householder, w/children | 24.3% | 22.6% | 15.8% |
| Single householder, no children | 14.4% | 19.6% | 10.8% |