| | Raymondville, TX | San Isidro, TX | United States |
| Population | 10,574 | 182 | 329,725,481 |
| Female Population | 44.1% | 36.8% | 50.5% |
| Male Population | 55.9% | 63.2% | 49.5% |
| Median Age | 32.1 | 42.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 11,314 | 266 | 309,327,143 |
| Population - 2000 | 9,733 | 270 | 285,036,114 |
| Population - 1990 | 8,880 | 223 | 251,960,433 |
| Pop. 2000 to Now | 10.6% | 11.1% | 15.6% |
| Pop. 1990 to Now | 21.3% | 34.5% | 30.8% |
| space4 | | | |
| Population Density | 2,569.6 | 58.7 | 93.4 |
| Land Area | 4.1 | 3.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Raymondville, TX | San Isidro, TX | United States |
| Age 0 to 4 | 7.1% | 0.0% | 5.9% |
| Age 5 to 9 | 7.6% | 2.2% | 6.1% |
| Age 10 to 14 | 6.9% | 2.2% | 6.6% |
| Age 15 to 17 | 3.2% | 11.5% | 3.9% |
| Age 18 to 20 | 3.8% | 0.0% | 4.0% |
| Age 21 to 24 | 7.0% | 29.7% | 5.2% |
| Age 25 to 34 | 20.3% | 0.0% | 13.8% |
| Age 35 to 44 | 12.7% | 11.5% | 12.9% |
| Age 45 to 54 | 12.0% | 30.8% | 12.6% |
| Age 55 to 59 | 2.6% | 2.7% | 6.7% |
| Age 60 to 64 | 5.2% | 3.8% | 6.3% |
| Age 65 to 74 | 6.6% | 0.0% | 9.6% |
| Age 75 to 84 | 3.3% | 0.0% | 4.5% |
| Age 85 and over | 1.8% | 5.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Raymondville, TX | San Isidro, TX | United States |
| White | 8.7% | 0.0% | 59.4% |
| Black | 1.2% | 0.0% | 12.2% |
| Asian | 0.0% | 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 | 0.8% | 0.0% | 3.2% |
| Hispanic | 89.3% | 100.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Raymondville, TX | San Isidro, TX | United States |
| Married Population | 43.0% | 23.0% | 49.8% |
| Currently Married | 36.0% | 23.0% | 48.0% |
| Married but Separated | 7.0% | 0.0% | 1.8% |
| Single Population | 57.0% | 77.0% | 50.2% |
| Never Married | 39.6% | 55.2% | 33.8% |
| Divorced | 11.3% | 0.0% | 10.8% |
| Widowed | 6.1% | 21.8% | 5.6% |
| space5 | | | |
| Household Size | 3.59 | 2.84 | 2.60 |
| Households | 2,632 | 64 | 124,010,992 |
| Family Households | 2,024 | 54 | 80,755,759 |
| Married couple, w/children | 24.4% | 29.6% | 30.5% |
| Married couple, no children | 25.0% | 0.0% | 42.9% |
| Non Family Households | 608 | 10 | 43,255,233 |
| Single householder, w/children | 32.3% | 14.8% | 15.8% |
| Single householder, no children | 18.2% | 55.6% | 10.8% |